Mayants, A. G.; Pyreseva, K. G.; Gordeichuk, S. S. Journal of Organic Chemistry USSR (English Translation), 1986 , vol. 22, # 10 p. 1900 - 1903 Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 10 p. 2120 - 2123