Rustamov, E.A. (1992). Wintering of a waterfowl in Turkmenistan. Biology Science.№3. Moscow. (in Russian)
Shirekov R. (1990). Rare and little-studied of Anseriformes. Rare and little-studied birds of Central Asia. Tashkent. Uzbekistan (in Russian).
BirdLife International (2020) Important Bird Areas factsheet: Zeyit - Kelif. Downloaded from
http://www.birdlife.org on 19/09/2020.