http://chinadigitaltimes.net/2009/04/baidus-internal-monitoring-and-censorship-document-leaked/

http://opennet.net/about-oni

http://www.alexa.com/topsites/countries/US

http://www.greatfirewallofchina.org/

http://www.nytimes.com/2008/02/04/world/asia/04iht-wall.1.9716090.html

http://toglobalist.org/2011/02/the-fall-of-the-great-firewall/

http://www.slideshare.net/Scueto77/digital-censorship-and-the-great-firewall-of-china

http://www.govtrack.us/congress/bill.xpd?bill=h110-275