http://pc.nikkeibp.co.jp/article/news/20090512/1015001/?set=rss

http://gigazine.net/index.php?/news/comments/20090513_gecko_edubook/

http://company.nikkei.co.jp/compinfo/compinfo_detail.aspx?CONT_ID=00020821

http://news.ameba.jp/weblog/2009/05/38254.html

http://www.gpara.com/article/cms_show.php?c_id=13475&c_num=14

http://www.ringolab.com/note/daiya/2009/05/post-989.html

http://www.excite.co.jp/News/column/20090512/Nationalgeo_42104563.html

http://www.gizmodo.jp/2009/05/post_5521.html

http://gigazine.net/index.php?/news/comments/20090513_tooth/

http://gigazine.net/index.php?/news/comments/20090513_sunrize_seto/

http://headlines.yahoo.co.jp/hl?a=20090513-00000084-san-soci

http://matimura.cocolog-nifty.com/matimulog/2009/05/jugement-68bd.html#more

http://headlines.yahoo.co.jp/hl?a=20090513-00000062-mai-soci