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when toggle format what by license comment
Aug 17, 2019 at 20:24 history made wiki Post Made Community Wiki by Todd Trimble
Oct 10, 2013 at 12:52 history edited Vladimir CC BY-SA 3.0
A Reference is added.
Oct 8, 2013 at 20:22 history edited Vladimir CC BY-SA 3.0
improve some phrase
Oct 8, 2013 at 20:13 history answered Vladimir CC BY-SA 3.0