1. N. V. Pavlova, Flora of Kazakhstan [in Russian], Vol. 3, Akad. Nauk KazSSR, Alma-Ata, 1960, pp. 274–281.
2. V. L. Komarov (ed.), Flora of the USSR [in Russian], Vol. 6, Izd. Akad. Nauk SSSR, Moscow, Leningrad, 1955, pp. 2–6.
3. L. D. Sokolov, Plant Resources of the USSR. Flowering Plants, Their Chemical Composition and Use [in Russian], Nauka, Leningrad, 1936, 237 pp.
4. B. Yeskaliyeva, M. A. Mesaik, A. Abbaskhan, A. Kulsoom, G. Sh. Burasheva, Zh. A. Abilov, M. I. Choudhary, and Atta-ur-Rahman, Phytochemistry, 67 (21), 2392 (2006).
5. B. K. Eskalieva, A. Akhmed, G. Sh. Burasheva, Zh. A. Abilov, and V. U. Akhmad, Chem. Nat. Compd., 40, 87 (2004).