My Bibliography:

Vos, Arthur.  The Norman Shield, Sigma Chi Fraternity, Evanston Illinois, 1997.

http://www.scalareale.org/scalcons.html

http://www.planetexplorer.com/ref/history/histconst.html

http://www.salve.edu/~dimaiom/conniei.html

http://www.suc.org/exhibitions/byz_coins/present/Constantine_I.html

http://www.homeusers.prestel.co.uk/littleton/jmconsta.htm

http://www.britannia.com/history/bb324.html