1. Internet Usage Statistics, http://www.internetworldstats.com/stats.htm (retrieved on July 13, 2010)
2. Anderson, T., Blumenthal, D., Casey, D., Clark, D., Estrin, D.: GENI: Global environment for network innovations, Version 4.5 (April 23, 2007)
3. NSF NeTS Future Internet Design Initiative, http://www.nets-find.net
4. Grubesic, T.H., O’Kelly, M.E., Murray, A.T.: A Geographic Perspective on Commercial Internet Survivability. Telematics and Informatics (2002)
5. ARIN, Number Resource Polivy Manual (NRPM), Version 2010.1 (April 2010), http://www.arin.net/policy/