Mechelin, Leopold Henrik Stanislaus. 1894. Finland in the Nineteenth Century. Helsingfors: F. Tilgmann, 274.
464
Mayr, Ernst. 1957. “Species Concepts and Definitions,” in The Species Problem. Washington D. C.: Amer. Assoc. Adv. Sci. Publ., no. 50. См. также: Mayr, Ernst. 1988. Toward a New Philosophy of Biology. Cambridge, MA: Harvard University Press.
