BioStor
 | A synopsis of the genus Herrania R E Schultes (1958) Journal of the Arnold Arboretum 39: 217-295 |
 | Frogs of the genus Eleutherodactylus (Leptodactylidae) in western Ecuador: systematics, ecology, and biogeography John D Lynch and William E Duellman (1997) University of Kansas Museum of Natural History Special Publication 23: 1-236 |