Zelenin, K. N.; Dovgilevich, A. V.; Bezhan, I. P.; Golubeva, G. A.; Sviridova, L. A.; et al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 5 p. 529 - 536
Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 5 p. 659 - 666