1. Agence France Presse (AFP) 2008 China quake: transport, communications chaotic http://www.theage.com.au/news/world/china-quake-transport-communications-chaotic/2008/05/13/1210444377453.html
2. Agence France Presse (AFP) 2008 ‘Twitters’ beat media in reporting China earthquake http://en.kioskea.net/actualites/twitters-beat-media-in-reporting-china-earthquake-10370-actualite.php3
3. Asia Digital Map 2010 7 Things Sina Microblog (Weibo) has that Twitter doesn't http://www.asiadigitalmap.com/2010/03/7-things-sina-microblog-weibo-has-that-twitter-doesn't/
4. BBC News 2008 Twitter and the China Earthquake http://www.bbc.co.uk/blogs/technology/2008/05/twitter_and_the_china_earthqua.html