Zelenin, K. N.; Motorina, I. A.; Sviridova, L. A.; Bezhan, I. P.; Ershov, A. Yu.; et al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 9 p. 1018 - 1024
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 9 p. 1270 - 1276

Zelenin, K. N.; Motorina, I. A.; Sviridova, L. A.; Bezhan, I. P.; Ershov, A. Yu.; et al.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 9 p. 1018 - 1024
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 9 p. 1270 - 1276