Mndzhoyan, Sh. L.; Tsinker, M. G.; Ovakimyan, A. R.; Ter-Zakharyan, Yu. Z.; Oganyan, Sh. G. Pharmaceutical Chemistry Journal, 1980 , vol. 14, # 3 p. 179 - 184 Khimiko-Farmatsevticheskii Zhurnal, 1980 , vol. 14, # 3 p. 53 - 59