Karkishchenko, N. N.; Alekseev, V. G.; Anisimova, V. A.; Korol', E. L.; Vilkov, G. A.; et al.
Pharmaceutical Chemistry Journal, 1987 , vol. 21, # 4 p. 242 - 247
Khimiko-Farmatsevticheskii Zhurnal, 1987 , vol. 21, # 4 p. 408 - 413