1. Allen, G.M., 1938. The mammals of China and Mongolia. Natural History of Central Asia, vol. XI, Part 1. The American Museum of Natural History, New York.
2. The Rare Animal Species in Gansu,1976
3. A report on the rare animal species in Sichuan,1977
4. Mammals of Tibet;Feng,1986
5. Gao, Y., 1987. Fauna Sinica, Mammalia, vol. 8, Carnivora. Science Press, Beijing (in Chinese).