Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 26, # 8 p. 863 - 869
Khimiya Geterotsiklicheskikh Soedinenii, , # 8 p. 1033 - 1041
Laba, V. I.; Sviridova, A. V.; Bol'shakova, T. N.; Tuzhilkova, T. N.; Litvinov, V. P.
Pharmaceutical Chemistry Journal, 1991 , vol. 25, # 3 p. 174 - 177
Khimiko-Farmatsevticheskii Zhurnal, 1991 , vol. 25, # 3 p. 27 - 29