Manaeva, T. V.; Perevalov, V. P.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1990 , vol. 26, # 10 p. 1196
Khimiya Geterotsiklicheskikh Soedinenii, 1990 , # 10 p. 1430 - 1431

Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 26, # 10 p. 1196
Khimiya Geterotsiklicheskikh Soedinenii, , # 10 p. 1430 - 1431