Naddaka, V. I.; Avanesyan, K. V.; Cherkinskaya, M. L.; Minkin, V. I. Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, # 6 p. 1154 - 1156 Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 6 p. 1282 - 1284