Kulinkovich, O. G.; Tishchenko, I. G.; Sviridov, S. V. Journal of Organic Chemistry USSR (English Translation), 1986 , vol. 22, # 9 p. 1682 - 1686 Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 9 p. 1873 - 1878