1. Kaushik D., Central Asia in Modern Times - A History from the Early 19th Century, Moscow, Progress Publishers, 1970, p.40.
2. Sheykh-Attar Ali-Reza, The Roots of Political Behaviour in Central Asia and the Caucasus, Teheran, Centre for Central Asian and Caucasian Research, The Institute for Political and International Studies, 1992, p.14.
3. Riasanovsky Nicholas V., A History of Russia, New York: Oxford University Press, 1984, pp. 576–77.