Makin, S. M.; Kruglikova, R. I.; Kharitonova, O. V.; Arshava, B. M. Journal of Organic Chemistry USSR (English Translation), 1987 , vol. 23, p. 1846 - 1849 Zhurnal Organicheskoi Khimii, 1987 , vol. 23, # 10 p. 2089 - 2093