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RFC 2516:A Method for Transmitting PPP Over Ethern...
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11. References

[1] Simpson, W., Editor, "The Point-to-Point Protocol (PPP)", STD 51, RFC 1661std51, July 1994
[2] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[3] Krawczyk, H., Bellare, M. and R. Canetti, "HMAC: Keyed-Hashing for Message Authentication", RFC 2104, February 1998.
[4] Reynolds, J. and J. Postel, "Assigned Numbers", STD 2, RFC 1700hist(-> 3232), October 1994. See also: http://www.iana.org/numbers.html
[5] Yergeau, F., "UTF-8, a transformation format of ISO 10646", RFC 2279(-> 3629std63), January 1998.

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