http://bionews.naturejpn.com/article.php?ID=1026

http://dream.kdn.ne.jp/input.html

http://www.watch.impress.co.jp/game/docs/20061227/soft.htm

http://www21.atwiki.jp/nintendo_vc/

http://plusd.itmedia.co.jp/games/articles/0612/27/news073.html