(http://www.gpara.com/article/cms_show.php?c_id=11364&c_num=14)

(http://www.inside-games.jp/news/332/33219.html)

(http://alfalfa.livedoor.biz/archives/51421587.html)

(http://sankei.jp.msn.com/science/science/090101/scn0901010827000-n1.htm)