http://bulldra.hatenablog.com/entry/love-theory

http://ji-sedai.jp/series/research/018.html

http://www.sankei.com/world/news/141227/wor1412270014-n1.html

http://www.hochi.co.jp/soccer/national/20141226-OHT1T50195.html

http://www.jiji.com/jc/zc?k=201412%2F2014122600787

http://nectaris.hatenablog.com/entry/2014/12/27/013656

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