Collins, Joseph T. & Suzanne L. Collins. (2009). A Pocket Guide to Kansas Snakes. Second Edition. Friends of the Great Plains Nature Center, Wichita, Kansas. Pp. 69. (2.31 MB) http://www.naherpeto...
Krysko, Kenneth L. & Walter S. Judd (2006) Morphological systematics of Kingsnakes, Lampropeltis getula complex (Serpentes: Colubridae), in the eastern United States. Zootaxa. (1193): pp. 1-39. (1.44 MB)