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Blokhin, A. V.; Tyurekhodzhaeva, M. A.; Bazhenov, D. V.; Bobrovskii, S. I.; Bundel', Yu. G.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1990 , vol. 26, # 9 p. 1022 - 1025
Khimiya Geterotsiklicheskikh Soedinenii, 1990 , vol. 26, # 9 p. 1226 - 1229
