http://www.cse.cuhk.edu.hk/~lyu/news/socialGame.htm

http://games.slashdot.org/article.pl?sid=09/07/27/1535247

http://blog.seattlepi.com/microsoft/archives/174721.asp?from=blog_last3

http://www.fun2chill.com/?tag=page-hunt

http://jurnsearch.wordpress.com/2009/07/28/page-hunt/

http://www.webmasterworld.com/msn_microsoft_search/3960431.htm

http://blogoscoped.com/forum/158101.html

http://www.eweek.com/c/a/Search-Engines/Microsoft-Bing-Could-Be-Improved-with-Online-Game-663339/

http://www.pcmag.com/article2/0,2817,2350837,00.asp

http://news.ccidnet.com/art/11099/20090728/1841433_1.html

http://tech.sina.com.cn/i/2009-07-29/00043303340.shtml