http://gigazine.net/news/20110505_ltd_tools/

http://www.kyokyaku.com/

http://www.ringolab.com/note/daiya/2011/05/post-1434.html

http://blog.kajika.net/?eid=998669

http://www.afpbb.com/article/politics/2798221/7169339?utm_source=afpbb&utm_medium=topics&utm_campaign=txt_topics

http://headlines.yahoo.co.jp/hl?a=20110505-00000069-jij-soci