Stupnikova, T. V.; Petrenko, V. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 10 p. 1140 - 1144
Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 10 p. 1383 - 1387

Stupnikova, T. V.; Petrenko, V. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 4 p. 460 - 461
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , # 4 p. 556 - 557