Kelarev, V. I.; Shvekhgeimer, G. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1980 , vol. 16, # 5 p. 501 - 506
Khimiya Geterotsiklicheskikh Soedinenii, 1980 , # 5 p. 645 - 650

Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 16, # 5 p. 501 - 506
Khimiya Geterotsiklicheskikh Soedinenii, , # 5 p. 645 - 650