Mamardashvili, N. Zh.; Semeikin, A. S.; Golubchikov, O. A. Russian Journal of Organic Chemistry, 1993 , vol. 29, # 6.2 p. 1007 - 1015 Zhurnal Organicheskoi Khimii, 1993 , vol. 29, # 6 p. 1213 - 1223