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Ernst, C.H.; Ernst, E.M. 2011 Venomous reptiles of the United States, Canada, and northern Mexico. Volume 1: Heloderma, Micruroides, Micrurus, Pelamis, Agkistrodon, Sistrurus. Johns Hopkins University Press, Baltimore. 352 pp.

Ernst, C.H.; Ernst, E.M. 2012 Venomous reptiles of the United States, Canada, and northern Mexico. Volume 2: Crotalus. Johns Hopkins University Press, Baltimore. 424 pp.