Naddaka,, V.I.; Gar'kin, V.P.; Obayan, K.V.; Minkin, V.I. Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, p. 579 - 580 Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 3 p. 669 - 670