1. A Border Gateway Protocol 4 (BGP-4) RFC, http://www.rfc-editor.org/rfc/rfc4271.txt
2. BGP Routing Leak Detection System Routing Leak Detection System, http://puck.nether.net/bgp/leakinfo.cgi
3. Macroscopic Topology Measurements, http://www.caida.org/projects/macroscopic/
4. The DIMES project, http://www.netdimes.org/new/
5. 7007 Explanation and Apology, http://www.merit.edu/mail.archives/nanog/1997-04/msg00444.html/