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http://mainichi.jp/enta/book/hondana/news/20100829ddm015040029000c.html

http://mainichi.jp/select/opinion/hasshinbako/news/20100824ddm004070148000c.html

http://sankei.jp.msn.com/science/science/100823/scn1008231710005-n1.htm

http://sankei.jp.msn.com/life/trend/100824/trd1008242306020-n1.htm

http://agora-web.jp/archives/1078433.html