Hoyer, Richard F.; Stewart, Glenn R. (2000). "Biology of the rubber boa (Charina bottae), with emphasis on C. b. umbratica. Part I: Capture, size, sexual dimorphism, and reproduction". Journal of Herpetology. 34 (3): 348–354. doi:10.2307/1565355. JSTOR1565355.
Hoyer, Richard F.; Stewart, Glenn R. (2000). "Biology of the rubber boa (Charina bottae), with emphasis on C. b. umbratica. Part I: Capture, size, sexual dimorphism, and reproduction". Journal of Herpetology. 34 (3): 348–354. doi:10.2307/1565355. JSTOR1565355.