Urriola Hernández, M., J. Cabrera Peña, and M. Protti Quesada. “Fertility, Fecundity and Gonadosomatic Index of <i>Poecilia reticulata</i≫ (Pisces: Poeciliidae) in Heredia, Costa Rica”. Revista De Biología Tropical, vol. 52, no. 4, Dec. 2004, pp. 945–950, https://revistas.ucr.ac.cr/index.php/rbt/article/view/15589.