Bal'on, Ya. G.; Shul'man, M. D.; Vakulenko, L. I.
Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 7.1 p. 1231 - 1237
Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 7 p. 1369 - 1376