Ganushchak, N. I.; Obushak, N. D.; Polishchuk, O. P.
Journal of Organic Chemistry USSR (English Translation), 1986 , vol. 22, # 12 p. 2291 - 2295
Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 12 p. 2554 - 2558