Petrova, T. D.; Ryabichev, A. G.; Savchenko, T. I.; Platonov, V. E.; Mamatyuk, V. I.; et al. Journal of Organic Chemistry USSR (English Translation), 1986 , vol. 22, # 6 p. 1168 - 1176 Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 6 p. 1297 - 1306