Akhmedov, M. A.; Vladimirova, I. I.; Kostikov, R. R.; Kyazimov, Sh. K. Journal of Organic Chemistry USSR (English Translation), 1986 , p. 986 - 987 Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 5 p. 1097 - 1099