Poplavskii, V. S.; Ostrovskii, V. A.; Koldobskii, G. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , vol. 18, # 2 p. 213 - 214
Khimiya Geterotsiklicheskikh Soedinenii, 1982 , # 2 p. 268

Buzilova, S. R.; Brekhov, Yu. V.; Afonin, A. V.; Gareev, G. A.; Vereshchagin, L. I.
Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 7.2 p. 1375 - 1379
Zhurnal Obshchei Khimii, 1989 , vol. 25, # 7 p. 1524 - 1528

Poplavskii, V. S.; Ostrovskii, V. A.; Koldobskii, G. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , vol. 18, # 2 p. 213 - 214
Khimiya Geterotsiklicheskikh Soedinenii, 1982 , # 2 p. 268