Fachín-Terán, Augusto, and Richard C. Vogt. “Population Structure, Size and Sex Ratio in Podocnemis Unifilis (Testudines, Podocnemididae) in the Guaporé River (RO), Northern Brazil”. Phyllomedusa: Journal of Herpetology, vol. 3, no. 1, June 2004, pp. 29-42, https://doi.org/10.11606/issn.2316-9079.v3i1p29-42.