1. E. P. Nakova and O. N. Tolkachev, Khim. Prir. Soedin., 86 (1985) [in this issue].
2. E. P. Nakova, O. N. Tolkachev, and R. P. Evstigneeva, in: Vth Indo-Soviet Symposium on the Chemistry of Natural Compounds. Abstracts of Lectures [in Russian], Erevan (1978), p. 62.
3. E. P. Nakova, O. N. Tolkachev, and R. P. Evstigneeva, Zh. Org. Khim.,17, 637 (1981).
4. Manuscripts of Contributed Papers;E. P. Nakova,1975
5. Symposium Papers;O. N. Tolkachev,1978