References
TAC BGP pages
http://www.cisco.com/cgi-bin/Support/PSP/psp_view.pl?p=Internetworking:BGP
BGP Case Studies
http://www.cisco.com/warp/public/459/bgp-toc.html
Internet Routing Architectures
http://www.ciscopress.com/book.cfm?series=1&book=155
Standards
RFC 1771, 1997, etc…
http://www.rfc-editor.org/rfcsearch.html
http://search.ietf.org/search/brokers/internet-drafts/query.html