Watson, D.E. & Thorson, T.B. (1976)
Helminths from elasmobranchs in Central American fresh waters.
In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press 629–640
Rodriguez-Ortiz, B. & Garcia-Prieto, L. & Perez-Ponce de Leon, G. (2004)
Checklist of the helminth parasites of vertebrates in Costa Rica.
Revista de Biología Tropical, 52: 1–41