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Chemistry of Heterocyclic Compounds (New York, NY, United States), 1993 , vol. 29, # 5 p. 548 - 552
Khimiya Geterotsiklicheskikh Soedinenii, 1993 , vol. 29, # 5 p. 642 - 647
Gorgos, V. I.; Zorin, L. M.; Zhungietu, G. I.; Rekhter, M. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 11 p. 1179 - 1181
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , # 11 p. 1490 - 1492
