http://www.ringolab.com/note/daiya/2012/12/line.html

http://gigazine.net/news/20121205-missing-countries/

http://www.excite.co.jp/News/economy_clm/20121205/Itmedia_makoto_20121205041.html

http://matimura.cocolog-nifty.com/matimulog/2012/12/jugement-5cdc.html

http://headlines.yahoo.co.jp/hl?a=20121206-00000018-mai-soci

http://www3.nhk.or.jp/news/html/20121207/k10014016331000.html