Kuznetsova, M. A.; Deryagina, E. N.; Voronkov, M. G. Journal of Organic Chemistry USSR (English Translation), 1985 , vol. 21, # 11 p. 2130 - 2132 Zhurnal Organicheskoi Khimii, 1985 , vol. 21, # 11 p. 2331 - 2333