1. QDMA’s whitetail deer report 2009;Adams,2009
2. Agricultural Research Service, 2012. Usda Plant Hardiness Zone Map. U.S. Department of Agriculture. http://planthardiness.ars.usda.gov/PHZMWeb/Accessed 5 March 2018.
3. An Introduction to Mathematical Biology;Allen,2007
4. Über die verhältnisse der wärmeökonomie der thiere zu ihrer grösse (Concerning the Relationship of Heat Conservation of Animals to Their Size);Bergmann,1848
5. Geographic gradients in body size: a clarification of bergmann’s rule;Blackburn;Divers. Distrib.,1999