s file contains citations for all RFCs in numeric order.
RFC citations appear in this format:
#### T... (DOI: 10.17487/RFC0979)
0980 Protocol document order information. O.J. Jacobsen, J. Postel. March
... 487/RFC1692)
1693 An Extension to TCP : Partial Order Service. T. Connolly, P. Amer,
P. Conrad. N... (SONET/SDH) with virtual
concatenation, high order and low order payloads. N. Jones, C.
Murton.