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

@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}}
} 

@Book{Spar2014,
 author = {M. Sparreboom},
 year = {2014},
 title = {Salamanders of the Old World},
 publisher = {KNNV},
 address = {Untrecht}
} 

@Article{Senn1940,
 doi = {10.1002/aja.1000660307},
 author = {William C. Senning},
 year = {1940},
 title = {A study of age determination and growth of \emph{Necturus maculosus} based on the parasphenoid bone},
 journal = {American Journal of Anatomy},
 volume = {66(3)},
 pages = {1483–495}
} 

@Misc{amphibiaweb,
 howpublished = {\url{https://amphibiaweb.org/cgi/amphib_query?rel-common_name=like&where-scientific_name=Necturus+maculosus}}
} 

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

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

@Misc{landconservationfoundation,
 howpublished = {\url{https://www.landconservationfoundation.org/all-about-mudpuppies}}
}