*[http://en.wikipedia.org/wiki/Arius Wikipedia: Arius] ''Wikipedia'' article on Arius.*[http://www.newadvent.org/cathen/01718a.htm Catholic Encyclopedia: Arius] ''Catholic Encyclopedia'' article on Arius.*[http://www.fourthcentury.com/index.php/arius-chart The Complete Extant Works of Arius] From the "Fourth Century Christianity" webpage sponsored by Wisconsin Lutheran College.[http://www.fourthcentury.com/]*[http://www.newadvent.org/fathers/28161.htm St. Athanasius' ''Discourse against the Arians''] From Arius's chief opponent at the First Ecumenical Council.