Krysko, Kenneth L., and Walter S. Judd. “Morphological Systematics of Kingsnakes, Lampropeltis getula Complex (Serpentes: Colubridae), in the Eastern United States”. Zootaxa 1193, no. 1 (May 4, 2006): 1–39. Accessed May 2, 2025. https://www.mapress.com/zt/article/view/zootaxa.1193.1.1.