http://gigazine.net/index.php?/news/comments/20090428_hiphone/

http://www.forest.impress.co.jp/article/2009/04/27/googletb6ie.html

http://www.ringolab.com/note/daiya/2009/04/post-979.html

http://www.ringolab.com/note/daiya/2009/04/post-976.html

http://okada-yoshihiro.cocolog-nifty.com/blog/2009/04/post-5bde.html

http://headlines.yahoo.co.jp/hl?a=20090429-00000000-jct-soci

天井に突き刺した電動ドリルにぶら下がって1分間に何回回転できるか http://www.kotaro269.com/archives/50800125.html

http://news.yahoo.com/s/afp/20090420/lf_afp/lifestylebritainspaingastronomyaward_20090420211909

http://sankei.jp.msn.com/affairs/crime/090429/crm0904292245022-n1.htm

http://www.utp.or.jp/topics/files/2009/kaiseki_teisei.pdf

http://headlines.yahoo.co.jp/hl?a=20090430-00000509-san-soci

http://www3.nhk.or.jp/news/t10015694061000.html