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

@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{ZwarHage1991,
 doi = {10.1080/00306525.1975.9639381},
 author = {Von Peer Zwart and M. H. van der Hage and F. J. M. van Rest and J. W. W. Louwman},
 year = {1991},
 title = {Handraising a bearded vulture \emph{Gypaetus barbatus},
 with the aid of a commercial cat-food},
 journal = {Zool. Garten N. F.},
 volume = {61(3)},
 pages = {149--156}
} 

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

@Misc{avibase,
 howpublished = {\url{https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=81DB7410BE70406B&sec=lifehistory}}
} 

@Article{PrinPres1991,
 doi = {10.1016/0300-9629(91)90122-S},
 author = {R. Prinzinger and A.Pre{\ss}mar and E. Schleucher},
 year = {1991},
 title = {Body temperature in birds},
 journal = {Comp. Biochem. Physiol.},
 volume = {99A(4)},
 pages = {499-506}
}