Gerasimenko, Yu. E.; Poteleshchenko, N. T.; Romanov, V. V. Journal of Organic Chemistry USSR (English Translation), 1980 , vol. 16, # 9 p. 1646 - 1650 Zhurnal Organicheskoi Khimii, 1980 , vol. 16, # 9 p. 1933 - 1938