Litvin, B. L.; Gubrii, Z. V.; Shermolovich, Yu. G.; Novikov, V. P. Russian Journal of Organic Chemistry, 1999 , vol. 35, # 3 p. 377 - 383 Zhurnal Organicheskoi Khimii, 1999 , vol. 35, # 3 p. 401 - 407