@Misc{Wiki,
 howpublished = {\url{http://en.wikipedia.org/wiki/Heterodon_nasicus}}
} 

@Book{Kooy2010,
 author = {Kooijman, S.A.L.M.},
 year = {2010},
 title  = {Dynamic Energy Budget theory for metabolic organisation},
 publisher = {Cambridge Univ. Press, Cambridge},
 pages = {Table 4.2 (page 150), 8.1 (page 300)},
 howpublished = {\url{../../../bib/Kooy2010.html}}
} 

@Article{Plat1969,
 author = {Dwight R. Platt},
 year = {1969},
 title = {Natural History of the Hognose Snakes \emph{Heterodon platyrhinos} and \emph{Heterodon nasicus}},
 journal = {University of Kansas Publications, Museum of Natural History},
 volume = {18(4)},
 pages = {253-420}
} 

@incollection{WallEcke1999,
 howpublished = {https://repositories.lib.utexas.edu/bitstream/handle/2152/45254/0698_Heterodon_nasicus.pdf?sequence=1},
 author = {Walley, Harlan D. and Eckerman, Curtis M.},
 year = {1999},
 title = {\emph{Heterodon nasicus}},
 booktitle = {Catalogue of American Amphibians and Reptiles (CAAR)},
 volume = {698},
 pages = {1-10}
} 

@Misc{AnAge,
 howpublished = {\url{http://genomics.senescence.info/species/entry.php?species=Heterodon_nasicus}}
} 

@Misc{ADW,
 howpublished = {\url{https://animaldiversity.org/accounts/Heterodon_nasicus/}}
}