@misc{Ruusila_V._Costs_2000,
 author={Ruusila, V. and Ermala, A. and Hyvärinen, H.},
 volume={252},
 copyright={Rights Reserved - Restricted Access},
 journal={Journal of Zoology, Lond.},
 address={London},
 howpublished={online},
 year={2000},
 publisher={Wiley-Blackwell},
 language={eng},
 type={Text},
 title={Costs of reproduction in introduced female Canadian beavers ( Castor canadensis )},
 keywords={Canadian beavers, Castor canadensis, Female},
}