↑Batbold, J., Batsaikhan, N., Shar, S., Amori, G., Hutterer, R., Kryštufek, B., Yigit, N., Mitsain, G. y Palomo, L.J. (2008). «Castor fiber» (inglés). Llista Roxa d'especies amenazaes de la UICN 2011.2. Consultáu'l 18 de marzu de 2012.
↑ 3,03,1Genetic Divergence and Similarity of Introduced Populations of European Beaver (Castor fiber L., 1758) from Kirov and Novosibirsk Oblasts of Russia, Journal Russian Journal of Genetics, Publisher MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC. ISSN 1022-7954 (Print) 1608-3369 (Online), Issue Volume 37, Number 1 / January, 2001