1. Request for Comments (Informational) RFC 1631, Internet Engineering Task Force, May 1994.
2. RFC 1812, IETF, June 1995.
3. RFC 2461, December 2006.
4. Goldberg, A., & Radzik, T. (1993). A heuristic improvement of the Bellman–Ford algorithm. Applied Mathematics Letters, 6(3), 3–6.
5. Hawkinson, J., & Bates, T. (1996). RFC 1930: Guidelines for creation, selection, and registration of an autonomous system (AS). http://ftp.apnic.net/ietf/rfc/rfc1000/rfc1930.txt .