BioStor
 | Contributions to the ophiology of Lower California, Mexico and Central America E D Cope (1861) Proc. Acad. Nat. Sci. Philadelphia 13: 292-306 |
 | Notes upon some reptiles of the Old World E D Cope (1862) Proc. Acad. Nat. Sci. Philadelphia 14: 337-344 |
 | Vierter Nachtrag zum Katalogder herpetologischen Sammlung des Basler Museums F Müller (1885) Verhandlungen Ges Basel 7: 668-717 |