http://gigazine.net/news/20130312-sun-and-cloud/

http://undb.jp/activity/books.html

http://www.nikkansports.com/general/news/p-gn-tp0-20130315-1097865.html

http://news.goo.ne.jp/article/yomiuri/nation/20130315-567-OYT1T01164.html

http://www3.nhk.or.jp/news/html/20130315/k10013216571000.html

http://osaka.yomiuri.co.jp/e-news/20130315-OYO1T00271.htm?from=main1