BioStor
Bufo diptychus Cope, 1862
 | Catalogues of the reptiles obtained during the Explorations of the Parana, Paraguay, Vermejo and Uruguay Rivers, by Capt. Thos. J. Page, U.S.N.; and of those procured by Lieut. N. Michler, U.S. Top. Eng., Commander of the Expedition conducting the survey of the Atrato River E D Cope (1862) Proceedings of the Academy Natural Sciences of Philadelphia 14: 346-359 |
 | On Trachycephalus, Scaphiopus and other Batrachia E D Cope (1863) Proceedings of the Academy of Natural Sciences of Philadelphia 15: 43-54 |
 | Liste von Reptilien and Batrachiern aus Paraguay O Boettger (1885) Zeitschrift für Naturwissenschaften 58: 213-248 |
 | Note II. Reptiles and Batrachians from Surinam Th W Van Lidth De Jeude (1904) Notes from the Leyden Museum 25: 83-94 |