Krasavtsev, I. I.; Basalkevich, E. D.; Lozinskii, M. O. Journal of Organic Chemistry USSR (English Translation), 1984 , vol. 20, # 6 p. 1061 - 1063 Zhurnal Organicheskoi Khimii, 1984 , vol. 20, # 6 p. 1167 - 1169