Pituophis catenifer vertebralis (BLAINVILLE 1835)
| The Gopher-snakes of Western North America John Van Denburgh and Joseph R Slevin (1919) Proceedings of the Calaifornia Academy of Sciences 9: 197-220 | |
| Variations and relationships in the snakes of the genus Pituophis Olive Griffith Stull (1940) Bulletin of the United States National Museum 175: 1-225 | |
| The gopher snakes of Baja California, with descriptions of new subspecies of Pituophis catenifer Laurence M Klauber (1946) Transactions of the San Diego Society of Natural History 11: 1-40 |