BioStor
 | Notes upon some reptiles of the Old World E D Cope (1862) Proc. Acad. Nat. Sci. Philadelphia 14: 337-344 |
 | An examination of the Reptilia and Batrachia obtained by the Orton Expedition to Equador and the Upper Amazon, with notes on other species E D Cope (1868) Proc. Acad. Nat. Sci. Philadelphia 20: 96-140 |
 | Eleventh contribution to the herpetology of tropical America E D Cope (1879) Proc. Amer. Philos. Soc. 18: 261-277 |
 | Notes on the geographical distribution of batrachia and reptilia in western North America E D Cope (1883) Proc. Acad. Nat. Sci. Philadelphia 35: 10-35 |
 | Thirteenth contribution to the herpetology of tropical America E D Cope (1886) Proc. Amer. Philos. Soc. 23: 271-287 |
 | On the snakes of Florida E D Cope (1889) Proc. U. S. Natl. Mus 11: 381-394 |
 | A critical review of the characters and variations of the snakes of North America E D Cope (1892) Proc. US Natl. Mus. 14: 589-694 |
 | A Review of the Genera and Species of American Snakes, North of Mexico Arthur Erwin Brown (1901) Proceedings of The Academy of Natural Sciences of Philadelphia 53: 10-110 |
 | Generic types of nearctic Reptilia and Amphibia A E Brown (1908) Proceedings of the Academy of Natural Sciences of Philadelphia 60: 112-127 |
 | Checklist of the reptiles and amphibians of East Africa A Loveridge (1957) Bulletin of The Museum of Comparative Zoology 117: 151-362 |
 | Type specimens of reptiles and amphibians in the United States National Museum (1961) Bulletin of the United States National Museum 220: 1-291 |
 | The amphibians and reptiles of Sinaloa, Mexico L M Hardy and And R W Mcdiarmid (1969) University of Kansas Publications. Museum of Natural History 18: 39-252 |
 | Catalogue of the Neotropical Squamata. Part I. Snakes James A Peters and Braulio Orejas-Miranda (1970) Bulletin United States National Museum 297: 1-347 |
 | The coachwhip snake Masticophis flagellum (Shaw): taxonomy and distribution Larry David Wilson (1971) Tulane Studies in Zoology and Botany 16(2): 31-99 |