http://kagamilove0707.github.io/programming/2013/05/30/about-phantom-type/

http://d.hatena.ne.jp/osyo-manga/20130622/1371905937

http://jp.techcrunch.com/2013/06/18/20130617github-rolling-out-major-redesign-emphasis-on-speed-content-and-interactivity/

http://www.youtube.com/watch?v=cn-NsWRtaSY