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

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

@Misc{KovaLyde,
 howpublished = {\url{http://www.npolar.no/en/species/bearded-seal.html}}
} 

@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{AndeHjel1999,
 author = {M. Andersen and A. M. Hjelset and I. Gjertz and C. Lydersen and B. Gulliksen},
 year = {1999},
 title = {Growth, age at sexual maturity and condition in bearded seals (\emph{Erignathus barbatus}) from {S}valbard, {N}orway},
 journal = {Polar Biology},
 volume = {21},
 pages = {179--185}
}