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

@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{HayeLich1992,
 author = {T. Hayes and P. Licht},
 year = {1992},
 title = {Gonadal Involvement in Sexual Size Dimorphism in the {A}frican Bullfrog (\emph{Pyxicephalus adspersus})},
 journal = {J. Exp. Zool.},
 volume = {264},
 pages = {130--135}
} 

@Misc{EoL,
 howpublished = {\url{http://eol.org/pages/330829/overview}}
} 

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

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