Saloutina, L. V.; Kodess, M. I.; Zapevalov, A. Ya. Russian Journal of Organic Chemistry, 1993 , vol. 29, # 7.1 p. 1097 - 1107 Zhurnal Organicheskoi Khimii, 1993 , vol. 29, # 7 p. 1325 - 1336