Il'chenko, A. Ya.; Krokhtyak, V. I.; Yagupol'skii, L. M.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1981 , vol. 17, # 12 p. 1236 - 1237
Khimiya Geterotsiklicheskikh Soedinenii, 1981 , vol. 17, # 12 p. 1680 - 1681

Il'chenko, A. Ya.; Krokhtyak, V. I.; Yagupol'skii, L. M.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1981 , vol. 17, # 12 p. 1236 - 1237
Khimiya Geterotsiklicheskikh Soedinenii, 1981 , vol. 17, # 12 p. 1680 - 1681

Il'chenko, A. Ya.; Krokhtyak, V. I.; Yagupol'skii, L. M.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1981 , vol. 17, # 12 p. 1236 - 1237
Khimiya Geterotsiklicheskikh Soedinenii, 1981 , vol. 17, # 12 p. 1680 - 1681