1. Author's Cert. (USSR) No. 287 931; Otkrytiya, No. 36, 27 (1970).
2. Author's Cert. (USSR) No. 419 523; ibid., No. 10, 71 (1974).
3. Author's Cert. (USSR) No. 892 876; ibid., No. 35, 261 (1983).
4. Yu. S. Kagan, L. M. Sasinovich, N. V. Kokshareva, et al., Farmakol. Toksikol., No. 3, 294–297 (1975).
5. V. E. Krivenchuk and V. E. Petrun'kin, Khim.-farm. Zh., No. 3, 13–16 (1973).