• [Wiki] http://en.wikipedia.org/wiki/Heterodon_nasicus.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Heterodon_nasicus.
• [ADW] https://animaldiversity.org/accounts/Heterodon_nasicus/.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [Plat1969] Platt, D. R. (1969). Natural history of the hognose snakes Heterodon platyrhinos and Heterodon nasicus. University of Kansas Publications, Museum of Natural History, 18(4):253--420.
• [WallEcke1999] Walley, H. D. and Eckerman, C. M. (1999). Heterodon nasicus. In Catalogue of American Amphibians and Reptiles (CAAR), volume 698, pages 1--10.