http://diamond.jp/articles/-/42333

http://ameblo.jp/blog-leone1111/entry-11627958684.html

http://www.chunichi.co.jp/s/article/2013100390230249.html

http://www.asahi.com/national/update/1004/OSK201310040007.html

http://news.goo.ne.jp/article/yomiuri/nation/20131003-567-OYT1T00966.html