Felix I, Pope
- Very brief biography.
- http://www.saintpatrickdc.org/ss/0530.htm#feli

Felix I
- Very brief entry on his pontificate, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/felixi.html

St. Felix I
- Account of his pontificate. By Joseph Brusher.
- http://www.cfpeople.org/Books/Pope/POPEp26.htm

Pope St. Felix I
- The successor of Pope St. Dionysius, Felix died in 274. He is sometimes confused with a Roman martyr of the same name.
- http://www.newadvent.org/cathen/06029b.htm