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Ibatullin, U. G. Pavlov, Yu. V. Safarov, M. G. Chemistry of Heterocyclic Compounds (New York, NY, United States), 989 , vol. 25, # p. 7 - 9 Khimiya Geterotsiklicheskikh Soedinenii, 989 , # p. 26 - 28
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Ibatullin, U. G. Pavlov, Yu. V. Safarov, M. G. Chemistry of Heterocyclic Compounds (New York, NY, United States), 99 , vol. 26, # 2 p. 55 - 57 Khimiya Geterotsiklicheskikh Soedinenii, 99 , vol. 26, # 2 p. 8 - 86