A. Ermala

Costs of reproduction in introduced female Canadian beavers ( Castor canadensis )

H. Hyvärinen, V. Ruusila, A. Ermala, 2000 .

Mitochondrial Genomes Reveal Slow Rates of Molecular Evolution and the Timing of Speciation in Beavers (Castor), One of the Largest Rodent Species

M. Hofreiter, W. Durka, M. Stubbe, 2011, PloS one.

A Survey of Large Predators in Finland during the 19th–20th Centuries

A. Ermala, 2003 .