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when toggle format what by license comment
Apr 23, 2014 at 9:34 vote accept Juhana Siljander
Apr 15, 2014 at 12:50 history edited Zurab Silagadze CC BY-SA 3.0
reference added
Apr 15, 2014 at 9:27 history answered Zurab Silagadze CC BY-SA 3.0