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2. A. M. Aliev and I. S. Movsumov, Rastit. Resur., 17, No. 4, 602 (1981).
3. Flora of Azerbaidzhan, Vol. VIII, Baku, 1961, p. 90.
4. S. K. Cherepanov, Vascular Plants of the USSR [in Russian], Leningrad, 1981, p. 208.
5. A. M. Aliev, I. S. Movsumov, and E. Kh. Batirov, Khim. Prir. Soedin., 667 (1975).