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Chukhadzhyan, E. O.; Manasyan, L. A.; Chukhadzhyan, El. O.; Shakhatuni, K. G.; Babayan, A. T.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1995 , vol. 31, # 1 p. 58 - 62
Khimiya Geterotsiklicheskikh Soedinenii, 1995 , # 1 p. 68 - 72