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

@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{Hami1934,
 author = {W. J. Hamilton},
 year = {1934},
 title = {The Rate of Growth of the Toad (\emph{Bufo americanus americanus} {H}olbrook) under Natural Conditions},
 journal = {Copeia},
 volume = {1934},
 pages = {88-90}
} 

@Article{Beac2001,
 author = {Christopher K. Beachy},
 year = {2001},
 title = {Effects of Growth History and Exogenous Thyroxine on Size and Age at Metamorphosis in the Toad \emph{Bufo americanus}},
 journal = {Copeia},
 volume = {2001},
 pages = {829-834}
} 

@Misc{amphibiaweb,
 howpublished = {\url{https://amphibiaweb.org/cgi/amphib_query?scientific_name=Anaxyrus+americanus}}
} 

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