http://www.ringolab.com/note/daiya/2013/06/post-1819.html

http://www.sanspo.com/geino/news/20130719/oth13071905060016-n2.html

http://sankei.jp.msn.com/affairs/news/130722/crm13072217150006-n1.htm

http://www.iwanami.co.jp/topics/index_k.html

http://www.jiji.com/jc/c?g=soc_30&k=2013072200118