1. Scott WB: A History of Land Mammals in the Western Hemisphere. 1937, New York: Macmillan
2. Schluter D: The Ecology of Adaptive Radiation. 2000, Oxford: Oxford University Press
3. Givnish TJ, Sytsma KJ: Molecular Evolution and Adaptive Radiation. 1997, Cambridge: Cambridge University Press
4. Pocock RI: On the external characters and classification of the Mustelidae. Proc Zool Soc Lond. 1921, 1921: 803-837.
5. Simpson GG: The principles of classification and a classification of mammals. Bull Am Mus Nat Hist. 1945, 85: 1-350.