Abashev, G. G.; Russkikh, V. S.; Shklyaeva, E. V.; Vladykin, V. I. Russian Journal of Organic Chemistry, 1995 , vol. 31, # 11 p. 1533 - 1537 Zhurnal Organicheskoi Khimii, 1995 , vol. 31, # 11 p. 1705 - 1710