http://japanese.engadget.com/2014/02/04/ems-6/

http://www.forest.impress.co.jp/docs/news/20140205_633893.html

http://www.afpbb.com/articles/-/2907905?

http://headlines.yahoo.co.jp/hl?a=20140206-00000664-yom-soci

http://www.afpbb.com/articles/-/3007790

http://www.asahi.com/articles/ASG263HNSG26TIPE00Q.html

http://www.jiji.com/jc/c?g=obt_30&k=2014020600536