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

@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{RoseSchu2004,
 author = {F. Rosell and B. A. Schulte},
 year = {2004},
 title = {Sexual Dimorphism in the Development of Scent Structures for the Obligate Monogamous {E}urasian Beaver (\emph{Castor fiber})},
 journal = {J. Mammal.},
 volume = {85},
 number = {6},
 pages = {1138--1144}
} 

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

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