Ibragimov, I. I.; Tarasov, V. A.; Aliev, A. G.; Belyaeva, V. I. Journal of Organic Chemistry USSR (English Translation), 1991 , vol. 27, # 8.1 p. 1398 - 1402 Zhurnal Organicheskoi Khimii, 1991 , vol. 27, # 8 p. 1600 - 1604