@misc{Ruusila_V._Costs_2000, author={Ruusila, V. and Ermala, A. and Hyvärinen, H.}, volume={252}, copyright={Rights Reserved - Restricted Access}, address={London}, journal={Journal of Zoology, Lond.}, 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}, }