@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{DeroWiig2002,
 author = {Derocher, A. E. and Wiig, O.},
 year = {2002},
 title = {Postnatal growth in body length and mass of polar bears (\emph{Ursus maritimus}) at {S}valbard},
 journal = {Journal of Zoology},
 howpublished = {\url{http://http://onlinelibrary.wiley.com/doi/10.1017/S0952836902000377/epdf}},
volume = {256},
 pages = {343--349}
} 

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