Heptner, V. G., Sludskij, A. A. (1992) [1972]. "Cheetah, Pardus". Mlekopitajuščie Sovetskogo Soiuza. Moskva: Vysšaia Škola [Mammals of the Soviet Union. Volume II, Part 2. Carnivora (Hyaenas and Cats)]. Washington DC: Smithsonian Institution and the National Science Foundation. pp. 702–733.{{cite book}}: CS1 maint: multiple names: authors list (link)
One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Kushk". Encyclopædia Britannica. Vol. 15 (11th ed.). Cambridge University Press. pp. 954–955.