Mandrugin, A. A.; Fedoseev, V. M.; Khomutov, S. M.; Rodyunin, A. A.; Leshchev, Yu. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 11 p. 1262 - 1266
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 11 p. 1572 - 1575

Tkachenko, S. E.; Sal'nikov, D. I.; Lys, Ya. I.; Fedoseev, V. M.; Zhurilin, V. S.
Journal of Organic Chemistry USSR (English Translation), 1983 , vol. 19, # 5 p. 878 - 884
Zhurnal Organicheskoi Khimii, 1983 , vol. 19, # 5 p. 988 - 995