Gelasius
- Brief article on the first pope of that name, in the 1911 Encyclopædia Britannica.
- http://encyclopedia.jrank.org/GAG_GEO/GELASIUS.html

St. Gelasius
- Short biography.
- http://www.catholic.org/saints/saint.php?saint_id=652

Gelasius I, Pope
- Biographical portrait.
- http://www.saintpatrickdc.org/ss/1121.htm#gela

St. Gelasius I
- Short biography, by Joseph Brusher.
- http://www.cfpeople.org/Books/Pope/POPEp49.htm

Gelasius I
- Brief biography, by Karen Rae Keck.
- http://www2.evansville.edu/ecoleweb/glossary/gelasiusi.html

Pope St. Gelasius I
- An assessment of his pontificate. He died in 496.
- http://www.newadvent.org/cathen/06406a.htm