http://gigazine.net/news/20141125-onebooks/

http://www.nhk.or.jp/lnews/okayama/4025932481.html?t=1417001080000

http://news.goo.ne.jp/article/fminyu/region/fminyu-14840959.html

http://www.nikkei.com/article/DGKKASFS26H1E_W4A121C1PP8000/

http://news.goo.ne.jp/article/toon/region/toon-30229954.html