Shestopalov, A. M.; Sharanin, Yu. A.; Rodinovskaya, L. A.; Litvinov, V. P.
Journal of Organic Chemistry USSR (English Translation), 1990 , vol. 26, # 7.2 p. 1371 - 1375
Zhurnal Organicheskoi Khimii, 1990 , vol. 26, # 7 p. 1588 - 1593