Scartozzoni, R.R. e Marques, O.A.V. 2004. Sexual dimorphism, reproductive cycle, and fecundity of the water snake Ptychophis flavovirgatus (Serpentes, Colubridae). Phyllomedusa: Journal of Herpetology. 3, 1 (jun. 2004), 69–71. DOI:https://doi.org/10.11606/issn.2316-9079.v3i1p69-71.