(http://sakutaro11.livedoor.biz/archives/51673574.html)

(http://rocketnews24.com/2011/01/04/%e7%ac%ac87%e5%9b%9e%e7%ae%b1%e6%a0%b9%e9%a7%85%e4%bc%9d%e3%81%ab%e3%83%95%e3%83%aa%e3%83%bc%e3%82%b6%e3%81%8c%e5%87%ba%e7%8f%be/)

(http://www.excite.co.jp/News/bit/E1293513281710.html)

(http://sankei.jp.msn.com/life/education/100424/edc1004241836002-n1.htm)