Soloshonok, V. A.; Yagupol'skii, Yu. L.; Kukhar', V. P.
Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 12.1 p. 2263 - 2266
Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 12 p. 2523 - 2527