Spadola, F., and G. Insacco. “Endoscopy of Cloaca in 51 <i>Emys trinacris</i> (Fritz Et al., 2005): Morphological and Diagnostic Study”. Acta Herpetologica, vol. 4, no. 1, July 2009, pp. 73-81, doi:10.13128/Acta_Herpetol-2956.