1. Chikhi L., Goossen B., Treanor A., Bruford M.W., 2004 - Population genetic structure of and inbreeding in an insular cattle breed, the Jersey, and its implications for genetic resource management. Heredity 92, 396-401.
2. De Man D., Van Lint W., Gran K., Hiddinga B., 2005 - EAZA Yearbook 2005 - Pagan O. Pygmy hippopotamus EEP Annual Report 2005, Amsterdam: EAZA Executive Office, 548-550.
3. Grzimek B., 1990 - Grzimek’s encyclopedia of mammals. New York: McGraw-Hill Publishing Comps, ,y 5, 58-79.