The ecology and behavior of a pulse-type fish, Hypopomus occidentalis (Gymnotiformes, Hypopomidae), in a fresh water stream in PanamáNo. 2324–335
Hagedorn, Mary M. 1988. "The ecology and behavior of a pulse-type fish, Hypopomus occidentalis (Gymnotiformes, Hypopomidae), in a fresh water stream in Panamá." Copeia, (2) 324–335.