Heptner, V. G. ; Nasimovich, A. A. ; Bannikov, A. G. ; Hoffman, R. S. (1988) Mammals of the Soviet Union, Volume I, Washington, D.C.: Smithsonian Institution Libraries and National Science Foundation, pp. 19-82
bucknell.edu
Wozencraft, W. C. (2005-11-16). Wilson, D. E., and Reeder, D. M. (eds) (ed.). Mammal Species of the World (Edisi 3rd edition). Johns Hopkins University Press. ISBN 0-8018-8221-4. ; Pemeliharaan CS1: Banyak nama: editors list (link)