Belen'kaya,I.A. et al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1973 , vol. 9, p. 853 - 856
Khimiya Geterotsiklicheskikh Soedinenii, 1973 , vol. 9, p. 926 - 929
Belen'kaya, I. A.; Krokhina, G. P.; Andronati, S. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , vol. 18, # 10 p. 1038 - 1040
Khimiya Geterotsiklicheskikh Soedinenii, 1982 , vol. 18, # 10 p. 1344 - 1346