Kovalev, B. G.; Avdeeva, L. A.; Sorochinskaya, A. M.
Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, # 4 p. 641 - 646
Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 4 p. 713 - 718