Catholic Encyclopedia - Pope St. Simplicius, d. 483. www.newadvent.org/cathen/14002a.htm
For All the Saints - Brief profile. users.erols.com/saintpat/ss/0310.htm#simp
Popes Through the Ages - Account of the pontificate of St. Simplicius, from the book by Joseph Brusher. www.cfpeople.org/Books/Pope/POPEp47.htm
The Ecole Glossary - Short entry on Pope St. Simplicius mentions that he opposed Monothelitism. cedar.evansville.edu/~ecoleweb/glossary/simplicius.html
