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Trofimov, B. A.; Korostova, S. E.; Sobenina, L. N.; Mikhaleva, A. I.; Bzhezovskii, V. M.; et al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , vol. 18, # 2 p. 148 - 152
Khimiya Geterotsiklicheskikh Soedinenii, 1982 , vol. 18, # 2 p. 193 - 198
