Lokmane, E. Ya.; Sarul', E. A.; Freimanis, Ya. F.; Medynya, B. A.
Journal of Organic Chemistry USSR (English Translation), 1985 , vol. 21, # 12 p. 2354 - 2358
Zhurnal Organicheskoi Khimii, 1984 , vol. 21, # 12 p. 2574 - 2578