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Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , p. 1041 - 1043
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 10 p. 1311 - 1313
El'chaninov, M. M.; Simonov, A. M.; Simkin, B. Ya.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , vol. 18, # 8 p. 833 - 835
Khimiya Geterotsiklicheskikh Soedinenii, 1982 , vol. 18, # 8 p. 1089 - 1091
