Trofimov, B. A.; Mikhaleva, A. I.; Petrova, O. V.; Sigalov, M. V. Journal of Organic Chemistry USSR (English Translation), 1985 , vol. 21, # 12 p. 2391 Zhurnal Organicheskoi Khimii, 1985 , vol. 21, # 12 p. 2613 - 2614