Bobkov, V. N.; Zvolinskaya, T. V.; Kuz'menko, I. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1992 , vol. 28, # 11 p. 1317 - 1322
Khimiya Geterotsiklicheskikh Soedinenii, 1992 , # 11 p. 1539 - 1545

Bobkov, V. N.; Zvolinskaya, T. V.; Kuz'menko, I. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1990 , vol. 26, # 11 p. 1285 - 1288
Khimiya Geterotsiklicheskikh Soedinenii, 1990 , # 11 p. 1541 - 1544