http://www.asahi.com/culture/update/1207/TKY200912070400.html
http://sankei.jp.msn.com/culture/academic/091208/acd0912080714002-n1.htm
http://www.yomiuri.co.jp/national/culture/news/20091208-OYT1T00104.htm
http://headlines.yahoo.co.jp/hl?a=20091207-00000019-maip-soci
http://www3.nhk.or.jp/news/t10014282961000.html