1. Flora of Kirgiz SSR [in Russian], Vol. 8, Akademiya Nauk Kirgizskoi SSR, Frunze, 1959, 91 pp.
2. G. K. Shreter, Medicinal Plants and Plant Raw Material Included in Domestic Pharmacopoeias [in Russian], Moscow, 1972, 119 pp.
3. S. S. Sakhobiddinov, Wild Medicinal Plants of Central Asia [in Russian], Tashkent, 1948, 216 pp.
4. N. Stoyanov, Our Medicinal Plants [in Bulgarian], in 2 vol., Vol. 1, 2nd Ed., Sofiya, 1972, 344 pp.
5. V. N. Borisov, A. I. Ban’kovskii, V. I. Sheichenko, and M. G. Pimenov, Chem. Nat. Compd., 9, 646 (1973).