http://www.lifehacker.jp/2009/05/090521mac_1.html

http://d.hatena.ne.jp/aureliano/20090521/1242884890

http://gigazine.net/index.php?/news/comments/20090521_stair_battery/

http://kousyoublog.jp/?eid=2265

http://workhorse.cocolog-nifty.com/blog/2009/05/post-bac7.html

http://blog.tatsuru.com/2008/08/20_1610.php

http://leoclock.blogspot.com/2009/04/blog-post_27.html

http://www.kuroteru.com/2009/03/post_93.html

http://ameblo.jp/kokkoippan/entry-10264979779.html

http://www.cyzo.com/2009/05/post_1933.htmlhttp://www.cyzo.com/2009/05/post_2041.html

http://newfinder.jp/2009/05/20/12708.html

http://gigazine.net/index.php?/news/comments/20090521_jasrac_prize2009/