Rodrigues, João, Diego Soares, and José Silva. 2014. “Sexing Freshwater Turtles: Penile Eversion in <em>Phrynops tuberosus</Em> (Testudines: Chelidae)”. Acta Herpetologica 9 (2):259-63. https://doi.org/10.13128/Acta_Herpetol-14736.