Shramm, N. I.; Podushkina, N. A.; Zalesov, V. S.; Konshin, M. E. Pharmaceutical Chemistry Journal, 1981 , vol. 15, # 4 p. 249 - 252 Khimiko-Farmatsevticheskii Zhurnal, 1981 , vol. 15, # 4 p. 35 - 38