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

@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{PereKrau2016,
 author = {J. H. P\'{e}rez and J. S. Krause and H. E. Chmura and S. Bowman and M. McGuigan and A. L. Asmus and S. L. Meddle and K. E. Hunt and L. Gough and N. T. Boelman and J. C. Wingfield},
 doi = {10.1642/AUK-15-111.1},
 year = {2016},
 title = {Nestling growth rates in relation to food abundance and weather in the Arctic},
 journal = {The Auk},
 volume = {133},
 pages = {261-272}
} 

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

@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}
}