Simple Network Management Protocol Distributed Protocol Interface Version 2.0. B. Wijnen, G. Carpenter, K. Curran, A. Sehgal, G. Waters. March 1994. http://www.faqs.org/rfcs/rfc1592.html
Definitions of Managed Objects for Source Routing Bridges. E. Decker, K. McCloghrie, P. Langille, A. Rijsinghani. September 1993. http://www.faqs.org/rfcs/rfc1525.html