http://gigazine.net/news/20131214-how-save-time-on-tech/

http://www.hokkoku.co.jp/subpage/ET20131214071.htm

http://www3.nhk.or.jp/news/html/20131215/t10013839451000.html

http://news.goo.ne.jp/article/sankei/nation/snk20131212515.html?fr=rk

http://headlines.yahoo.co.jp/hl?a=20131215-00000376-yom-pol