1. A. V. Bogatskii, S. A. Andronati, and N. Ya. Golovenko, Tranquillizers [in Russian], Kiev (1990).
2. V. E. Klusha, Peptides Regulating Brain Functions [in Russian], Riga (1984).
3. A. A. Mazurov, S. A. Andronati, B. A. Lobasyuk, et al., Khim.-farm. Zh., No. 2, 155–158 (1988).
4. A. A. Firsov and V. K. Piotrovskii, Science and Technology, Pharmacology, Chemotherapeutic Substances [in Russian], Vol. 14, Moscow (1984), pp. 114–224.
5. Yu. E. Shapiro, V. Ya. Gorbatyuk, V. M. Kabanov, et al., Bioorg. Khim.,16, No. 12, 1607–1617 (1990).