Afonin, A. V.; Trofimov, B. A.; Malysheva, S. F.; Vashchenko, A. V. Journal of Organic Chemistry USSR (English Translation), 1992 , vol. 28, # 2.1 p. 181 - 190 Zhurnal Organicheskoi Khimii, 1992 , vol. 28, # 2 p. 225 - 236