Sigeev, A. S.; Beletskaya, I. P.; Petrovskii, P. V.; Peregudov, A. S. Russian Journal of Organic Chemistry, 2012 , vol. 48, # 8 p. 1055 - 1058,4 Zhurnal Organicheskoi Khimii, 2012 , vol. 48, # 8 p. 1059 - 1062,4