Daukshas, V. K.; Gaidyalis, P. G.; Pyatrauskas, O. Yu.; Udrenaite, E. B.; Gasperavichene, G. A.; Raguotene, N. V.
Pharmaceutical Chemistry Journal, 1987 , vol. 21, # 5 p. 341 - 345
Khimiko-Farmatsevticheskii Zhurnal, 1987 , vol. 21, # 5 p. 569 - 573

Daukshas, V. K.; Gaidyalis, P. G.; Udrenaite, E. B.; Labanauskas, L. K.; Gasperavichene, G. A.; et al.
Pharmaceutical Chemistry Journal, 1989 , vol. 23, # 12 p. 990 - 995
Khimiko-Farmatsevticheskii Zhurnal, 1989 , vol. 23, # 12 p. 1466 - 1470