Borodovitsyn, V. V.; Pozdnyakovich, Yu. V.; Shein, S. M. Journal of Organic Chemistry USSR (English Translation), 1986 , vol. 22, # 9 p. 1741 - 1746 Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 9 p. 1937 - 1943