Suvorov, B. V.; Bakirova, S. B.; Serazetdinova, V. A.; Ishaeva, D. T. Pharmaceutical Chemistry Journal, 1992 , vol. 26, # 11/12 p. 894 - 896 Khimiko-Farmatsevticheskii Zhurnal, 1992 , vol. 26, # 11-12 p. 81 - 83