Auffenberg, Walter. “The Genus Gopherus (Testudinidae): Pt. I. Osteology and Relationships of Extant Species”. Bulletin of the Florida Museum of Natural History 20, no. 2 (January 23, 1976): 47–110. Accessed May 6, 2026. https://flmnhbulletin.com/index.php/flmnh/article/view/flmnh-vol20-no2.