Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 2, p. 405 - 407
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 2, # 4 p. 541 - 544

Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 2, p. 405 - 407
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 2, # 4 p. 541 - 544

J. Gen. Chem. USSR (Engl. Transl.), , vol. 34, p. 3028 - 3034,3063 - 3069