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

@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{Kear1970,
 author = {J. Kear},
 year = {1970},
 title = {Studies on the development of young Tufted Duck},
 journal = {Wildfowl},
 volume = {21},
 pages = {123--132}
} 

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

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

@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}
}