Gulevich, Yu. V.; Bumagin, N. A.; Beletskaya, I. P. Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, # 10 p. 1918 - 1923 Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 10 p. 2126 - 2132