http://guideline.livedoor.biz/archives/50879443.html

http://www.itmedia.co.jp/bizid/articles/0704/19/news051.html

http://news.livedoor.com/article/detail/3119236/

http://www.itmedia.co.jp/bizid/articles/0704/19/news051.html

http://ja.wikipedia.org/wiki/%E3%83%91%E3%83%B3%E3%83%81%E3%83%A9#.E3.83.91.E3.83.B3.E3.83.81.E3.83.A9.E3.81.AE.E6.AD.B4.E5.8F.B2

http://3ping.org/2004/08/14/0232

http://txqz.net/blog/2004/01/12/0008

http://movie.maeda-y.com/movie/00895.htm

http://dc.watch.impress.co.jp/cda/weekend/2007/04/20/6100.html

http://markezine.jp/a/article/aid/1096.aspx

http://www002.upp.so-net.ne.jp/hit/gizen.html

http://itpro.nikkeibp.co.jp/article/Interview/20070413/268234/

http://plusd.itmedia.co.jp/games/articles/0704/20/news032.html

http://allabout.co.jp/game/playstation/closeup/CU20070418A/

http://machicomi.jp/research/res10.html http://www.gamenews.ne.jp/archives/2007/04/805.html

http://youkanman.com/blog/2007/04/20-160000.php

http://www.watch.impress.co.jp/game/docs/20070420/katamari.htm

http://www.nintendo-inside.jp/news/204/20401.html