US5952932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication between master unit and slave unit with efficient protocol
Assignee: Lego AS
•
Filing: 1997-12-08
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Granted: 1999-09-14
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Expires: 2017-12-08
Abstract
Abstract A method of communication between a master unit and a slave unit, including the steps of: sending at least a command byte from the master unit to the slave unit including data byte counter bits to be interpreted by the slave unit according to the following rule set; if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes, which is the expected number of data bytes; if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before the expected number of data bytes is obtained; receiving at least the command byte; interpreting the command byte; and receiving the number of data bytes required by the rule set.
Inventors
- 👤 Bent S.o slashed.rensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:31
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/40; H04L69/00; H04L69/30; H04L69/32; H04L69/322; H04L69/324
Claims Analysis
Total Claims: 70
Claim 1
Independent Claim
141 words
A method of communication between a master unit and a slave unit comprising the steps of: sending a command byte from the master unit to the slave unit, said command byte comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contains information representing a number which must be decoded before an expected number of data bytes is obtained; receiving the command byte; interpreting the command byte; and receiving the number of data bytes required by the rule set.
Claim 2
Independent Claim
141 words
A method of communication between a master unit and a slave unit comprising the steps of: sending a command byte from the master unit to the slave unit, said command byte comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contains information representing a number which must be decoded before an expected number of data bytes is obtained; receiving the command byte; interpreting the command byte; and receiving the number of data bytes required by the rule set.
Claim 3
Dependent Claim
32 words
The method according to claim 1, further comprising the step of: increasing a message counter in said command byte each time a new message is sent, except when the message is retransmitted.
Claim 4
Dependent Claim
22 words
The method according to claim 2, wherein said step of increasing a message counter includes a step of increasing a single bit.
Claim 5
Dependent Claim
34 words
The method according to claim 1, wherein said step of sending a command byte includes the step of sending a command byte having 4 bits, of which 3 bits are data byte counter bits.
Claim 6
Dependent Claim
93 words
The method according to claim 1, wherein said step of sending a command byte having data byte counter bits belonging to the first set of commands comprises a step of sending one of 6 groups of commands, each group being respectively associated with 0, 1, 2, 3, 4, and 5 data bytes; and wherein said step of sending a command byte having data byte counter bits belonging to the second set of commands comprises a step of sending 2 groups of commands, each group being respectively associated with 0 and 1 data bytes.
Claim 7
Dependent Claim
34 words
The method according to claim 1, further comprising the steps of: sending an address byte for addressing a slave unit; and sending a complementary byte for each of the command, data, and address bytes.
Claim 8
Dependent Claim
34 words
The method according to claim 1, further comprising the steps of: sending a check sum succeeding said data bytes; and sending a complementary byte for each of the command, data, and check sum bytes.
Claim 9
Dependent Claim
22 words
The method according to claim 1, further comprising the step of: returning an acknowledge signal which is identical to he received signal.
Claim 10
Independent Claim
107 words
A method of receiving information in a slave unit, comprising the steps of: receiving a command byte comprising data byte counter bits; and receiving data bytes interpretable according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 11
Independent Claim
107 words
A method of receiving information in a slave unit, comprising the steps of: receiving a command byte comprising data byte counter bits; and receiving data bytes interpretable according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 12
Dependent Claim
27 words
The method according to claim 9, wherein said step of receiving a command byte comprises a step of receiving a message counter which remains unchanged during retransmissions.
Claim 13
Dependent Claim
22 words
The method according to claim 10, wherein said step of receiving a message counter includes a step of receiving a single bit.
Claim 14
Dependent Claim
30 words
The method according to claim 9, wherein the step of receiving a command byte includes a step of receiving 4 command bits of which 3 are data byte counter bits.
Claim 15
Dependent Claim
93 words
The method according to claim 9, wherein said step of receiving a command byte having data byte counter bits belonging to the first set of commands comprises a step of receiving one of 6 groups of commands, each group being respectively associated with 0, 1, 2, 3, 4, and 5 data bytes; and wherein said step of receiving a command byte having data byte counter bits belonging to the second set of commands comprises a step of sending 2 groups of commands, each group being respectively associated with 0 and 1 data bytes.
Claim 16
Dependent Claim
43 words
The method according to claim 9, further comprising the steps of: receiving an address byte and interpreting the associated command and data bytes if said address byte is accepted; and receiving a complementary byte for each of the command, data, and address bytes.
Claim 17
Dependent Claim
34 words
The method according to claim 9, further comprising the steps of: receiving a check sum succeeding said data bytes; and receiving a complementary byte for each of the command, data, and check sum bytes.
Claim 18
Dependent Claim
22 words
The method according to claim 9, further comprising the step of: returning an acknowledge signal which is identical to the received signal.
Claim 19
Independent Claim
117 words
A method of sending information from a master unit, comprising the steps of: sending a command byte comprising command bits and data byte counter bits; and sending a number of data bytes interpretable according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
Claim 20
Independent Claim
117 words
A method of sending information from a master unit, comprising the steps of: sending a command byte comprising command bits and data byte counter bits; and sending a number of data bytes interpretable according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
Claim 21
Dependent Claim
39 words
The method according to claim 17, wherein said step of sending a command byte further comprises a step of sending a message counter which is increased each time a new message is sent, except when the message is retransmitted.
Claim 22
Dependent Claim
22 words
The method according to claim 18, wherein said step of increasing a message counter includes a step of increasing a single bit.
Claim 23
Dependent Claim
31 words
The method according to claim 17, wherein said step of sending a command byte includes sending a command byte having 4 bits, of which 3 bits are data byte counter bits.
Claim 24
Dependent Claim
93 words
The method according to claim 17, wherein said step of sending a command byte having data byte counter bits belonging to the first set of commands comprises a step of sending one of 6 groups of commands, each group being respectively associated with 0, 1, 2, 3, 4, and 5 data bytes; and wherein said step of sending a command byte having data byte counter bits belonging to the second set of commands comprises a step of sending 2 groups of commands, each group being respectively associated with 0 and 1 data bytes.
Claim 25
Dependent Claim
34 words
The method according to claim 17, further comprising the steps of: sending an address byte for addressing a slave unit; and sending a complementary byte for each of the command, data, and address bytes.
Claim 26
Dependent Claim
34 words
The method according to claim 17, further comprising the steps of: sending a check sum succeeding said data bytes; and sending a complementary byte for each of the command, data, and check sum bytes.
Claim 27
Dependent Claim
118 words
A computer readable medium encoded with a program for transferring information between a master program and a slave program, the information comprising a command byte associated with a number of data bytes, the master program comprising a counter having a data structure with one parameter containing information on the number of associated data bytes, said parameter is modifiable according to the following rule set: if said command byte belongs to a first set of commands, then the command byte contains a value representing the number of associated data bytes and said parameter is modified with that value; and if said command byte belongs to a second set of commands, then said parameter is modified with a reduced value.
Claim 28
Dependent Claim
118 words
A computer readable medium encoded with a program for transferring information between a master program and a slave program, the information comprising a command byte associated with a number of data bytes, the master program comprising a counter having a data structure with one parameter containing information on the number of associated data bytes, said parameter is modifiable according to the following rule set: if said command byte belongs to a first set of commands, then the command byte contains a value representing the number of associated data bytes and said parameter is modified with that value; and if said command byte belongs to a second set of commands, then said parameter is modified with a reduced value.
Claim 29
Dependent Claim
114 words
A computer readable medium encoded with a slave program for receiving information, the information comprising a command byte associated with a number of data bytes, the slave program comprising a counter having a data structure with one parameter containing information on the number of associated data bytes, wherein said slave program modifies said parameter according to the following rule set: if said command byte belongs to a first set of commands, then the command byte contains a value representing the number of associated data bytes and said parameter is modified with that value; and if said command byte belongs to a second set of commands, then said parameter is modified with a reduced value.
Claim 30
Dependent Claim
114 words
A computer readable medium encoded with a slave program for receiving information, the information comprising a command byte associated with a number of data bytes, the slave program comprising a counter having a data structure with one parameter containing information on the number of associated data bytes, wherein said slave program modifies said parameter according to the following rule set: if said command byte belongs to a first set of commands, then the command byte contains a value representing the number of associated data bytes and said parameter is modified with that value; and if said command byte belongs to a second set of commands, then said parameter is modified with a reduced value.
Claim 31
Dependent Claim
118 words
A computer readable medium encoded with a master program for transmitting information, the information comprising a command byte associated with a number of data bytes, the master program comprising a data structure with one parameter containing information on the number of associated data bytes to be transmitted, said parameter being modified according to the following rule set: if said command byte belongs to a first set of commands, then the command byte contains a first value representing the number of associated data bytes and said parameter is modified with that value; and if said command byte belongs to a second set of commands, then said parameter is modified with a value which is different from said first value.
Claim 32
Dependent Claim
118 words
A computer readable medium encoded with a master program for transmitting information, the information comprising a command byte associated with a number of data bytes, the master program comprising a data structure with one parameter containing information on the number of associated data bytes to be transmitted, said parameter being modified according to the following rule set: if said command byte belongs to a first set of commands, then the command byte contains a first value representing the number of associated data bytes and said parameter is modified with that value; and if said command byte belongs to a second set of commands, then said parameter is modified with a value which is different from said first value.
Claim 33
Dependent Claim
140 words
A computer system for communication between a master unit and a slave unit comprising: means for sending a command byte from the master unit to the slave unit comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained; means for receiving the command byte; means for interpreting the command byte; and means for receiving the number of data bytes required by the rule set.
Claim 34
Dependent Claim
140 words
A computer system for communication between a master unit and a slave unit comprising: means for sending a command byte from the master unit to the slave unit comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained; means for receiving the command byte; means for interpreting the command byte; and means for receiving the number of data bytes required by the rule set.
Claim 35
Dependent Claim
104 words
A computer system for receiving information in a slave unit, comprising: means for receiving a command byte comprising data byte counter bits; and means for receiving data bytes according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 36
Dependent Claim
104 words
A computer system for receiving information in a slave unit, comprising: means for receiving a command byte comprising data byte counter bits; and means for receiving data bytes according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 37
Dependent Claim
114 words
A computer system for sending information from a master unit, comprising: means for sending a command byte comprising command bits and data byte counter bits; and means for sending a number of data bytes, according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
Claim 38
Dependent Claim
114 words
A computer system for sending information from a master unit, comprising: means for sending a command byte comprising command bits and data byte counter bits; and means for sending a number of data bytes, according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
Claim 39
Dependent Claim
150 words
A computer readable medium encoded with a program for performing a method of communication between a master unit and a slave unit, said method comprising the steps of: sending a command byte from the master unit to the slave unit comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contains information representing a number which must be decoded before an expected number of data bytes is obtained; receiving the command byte; interpreting the command byte; and receiving the number of data bytes required by the rule set.
Claim 40
Dependent Claim
150 words
A computer readable medium encoded with a program for performing a method of communication between a master unit and a slave unit, said method comprising the steps of: sending a command byte from the master unit to the slave unit comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contains information representing a number which must be decoded before an expected number of data bytes is obtained; receiving the command byte; interpreting the command byte; and receiving the number of data bytes required by the rule set.
Claim 41
Dependent Claim
35 words
The medium according to claim 30, wherein said method further includes the step of: increasing a message counter in said command byte each time a new message is sent, except when the message is retransmitted.
Claim 42
Dependent Claim
22 words
The medium according to claim 31, wherein said step of increasing a message counter includes a step of increasing a single bit.
Claim 43
Dependent Claim
31 words
The medium according to claim 30, wherein said step of sending a command byte includes sending a command byte having 4 bits, of which 3 bits are data byte counter bits.
Claim 44
Dependent Claim
93 words
The medium according to claim 30, wherein said step of sending a command byte having data byte counter bits belonging to the first set of commands includes a step of sending one of 6 groups of commands, each group being respectively associated with 0, 1, 2, 3, 4, and 5 data bytes; and wherein said step of sending a command byte having data byte counter bits belonging to the second set of commands comprises a step of sending 2 groups of commands, each group being respectively associated with 0 and 1 data bytes.
Claim 45
Dependent Claim
37 words
The medium according to claim 30, wherein the method further comprises the steps of: sending an address byte for addressing a slave unit; and sending a complementary byte for each of the command, data, and address bytes.
Claim 46
Dependent Claim
37 words
The medium according to claim 30, wherein the method further comprises the steps of: sending a check sum succeeding said data bytes; and sending a complementary byte for each of the command, data, and check sum bytes.
Claim 47
Dependent Claim
25 words
The medium according to claim 30, wherein the method further comprises the step of: returning an acknowledge signal which is identical to the received signal.
Claim 48
Dependent Claim
117 words
A computer readable medium encoded with a program for performing a method of receiving information in a slave unit, said method comprising the steps of: receiving a command byte comprising data byte counter bits; receiving data bytes, according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 49
Dependent Claim
117 words
A computer readable medium encoded with a program for performing a method of receiving information in a slave unit, said method comprising the steps of: receiving a command byte comprising data byte counter bits; receiving data bytes, according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 50
Dependent Claim
27 words
The medium according to claim 38, wherein said step of receiving a command byte comprises a step of receiving a message counter which remains unchanged during retransmissions.
Claim 51
Dependent Claim
22 words
The medium according to claim 39, wherein said step of receiving a message counter includes a step of receiving a single bit.
Claim 52
Dependent Claim
30 words
The medium according to claim 38, wherein the step of receiving a command byte includes a step of receiving 4 command bits, of which 3 are data byte counter bits.
Claim 53
Dependent Claim
94 words
The medium according to claim 38, wherein said step of receiving a command byte having data byte counter bits belonging to the first set of commands comprises a step of receiving one of 6 groups of commands, each group being respectively associated with 0, 1, 2, 3, 4, and 5 data bytes; and wherein said said step of receiving a command byte having data byte counter bits belonging to the second set of commands comprises a step of sending 2 groups of commands, each group being respectively associated with 0 and 1 data bytes.
Claim 54
Dependent Claim
46 words
The medium according to claim 38, wherein the method further comprises the steps of: receiving an address byte and interpreting the associated command and data bytes if said address byte is accepted; and receiving a complementary byte for each of the command, data, and address bytes.
Claim 55
Dependent Claim
37 words
The medium according to claim 38, wherein the medium further comprises the steps of: receiving a check sum succeeding said data bytes; and receiving a complementary byte for each of the command, data, and check sum bytes.
Claim 56
Dependent Claim
25 words
The medium according to claim 38, wherein the method further comprises the step of: returning an acknowledge signal which is identical to the received signal.
Claim 57
Dependent Claim
127 words
A computer readable medium comprising a program for performing a method of sending information from a master unit, said method comprising the steps of: sending a command byte comprising command bits and data byte counter bits; and sending a number of data bytes, according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
Claim 58
Dependent Claim
127 words
A computer readable medium comprising a program for performing a method of sending information from a master unit, said method comprising the steps of: sending a command byte comprising command bits and data byte counter bits; and sending a number of data bytes, according to the following rule set: if said data byte counter bits belong to a first set of commands, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set of commands, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
Claim 59
Dependent Claim
39 words
The medium according to claim 46, wherein said step of sending a command byte further comprises a step of sending a message counter which is increased each time a new message is sent, except when the message is retransmitted.
Claim 60
Dependent Claim
22 words
The medium according to claim 47, wherein said step of increasing a message counter includes a step of increasing a single bit.
Claim 61
Dependent Claim
30 words
The medium according to claim 46, wherein said step of sending a command byte includes sending a command byte having 4 bits, of which 3 bits data byte counter bits.
Claim 62
Dependent Claim
94 words
The medium according to claim 46, wherein said step of sending a command byte having data byte counter bits belonging to the first set of commands comprises a step of receiving one of 6 groups of commands, each group being respectively associated with 0, 1, 2, 3, 4, and 5 data bytes; and wherein said said step of sending a command byte having data byte counter bits belonging to the second set of commands comprises a step of sending 2 groups of commands, each group being respectively associated with 0 and 1 data bytes.
Claim 63
Dependent Claim
37 words
The medium according to claim 46, wherein the method further comprises the steps of: sending an address byte for addressing a slave unit; and sending a complementary byte for each of the command, data, and address bytes.
Claim 64
Dependent Claim
37 words
The medium according to claim 46, wherein the method further comprises the steps of: sending a check sum succeeding said data bytes; and sending a complementary byte for each of the command, data, and check sum bytes.
Claim 65
Dependent Claim
148 words
A computer readable medium encoded with a program for communicating information between a master unit and a slave unit, said program comprising: means for sending a command byte from the master unit to the slave unit comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained; means for receiving the command byte; means for interpreting the command byte; and means for receiving the number of data bytes required by the rule set.
Claim 66
Dependent Claim
148 words
A computer readable medium encoded with a program for communicating information between a master unit and a slave unit, said program comprising: means for sending a command byte from the master unit to the slave unit comprising data byte counter bits interpretable by the slave unit according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained; means for receiving the command byte; means for interpreting the command byte; and means for receiving the number of data bytes required by the rule set.
Claim 67
Dependent Claim
110 words
A computer readable medium encoded with a program for receiving information in a slave unit, said program comprising: means for receiving a command byte comprising data byte counter bits; means for receiving data bytes according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 68
Dependent Claim
110 words
A computer readable medium encoded with a program for receiving information in a slave unit, said program comprising: means for receiving a command byte comprising data byte counter bits; means for receiving data bytes according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is an expected number of data bytes; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be decoded before an expected number of data bytes is obtained.
Claim 69
Dependent Claim
120 words
A computer readable medium encoded with a program for sending information from a master unit, said program comprising: means for sending a command byte comprising command bits and data byte counter bits; means for sending a number of data bytes, according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
Claim 70
Dependent Claim
120 words
A computer readable medium encoded with a program for sending information from a master unit, said program comprising: means for sending a command byte comprising command bits and data byte counter bits; means for sending a number of data bytes, according to the following rule set: if said data byte counter bits belong to a first set, then said data byte counter bits contain information representing a number of associated data bytes which is the number of data bytes to be sent; and if said data byte counter bits belong to a second set, then said data byte counter bits contain information representing a number which must be encoded before the number of data bytes to be sent is obtained.
References Cited (Backward Citations)
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