Singh, S. P.; Sehgal, Subhash; Singh, Lukhvinder; Dhawan, S. N.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987 , vol. 26, # 1-12 p. 154 - 155
Kastron, V. V.; Vitolin', R. O.; Kanina, E. L.; Dubur, G. Ya.; Kimenis, A. A.
Pharmaceutical Chemistry Journal, 1987 , vol. 21, # 8 p. 571 - 574
Khimiko-Farmatsevticheskii Zhurnal, 1987 , vol. 21, # 8 p. 948 - 952