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Khimiya Geterotsiklicheskikh Soedinenii, 1991 , # 1 p. 86 - 92

Shanazarov, A. K.; Kuzovkin, V. A.; Chistyakov, V. V.; Granik, V. G. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1991 ,  vol. 27,  # 1  p. 71 - 76Khimiya Geterotsiklicheskikh Soedinenii, 1991 ,  # 1  p. 86 - 92