Abele, E. M.; Gol'dberg, Yu. Sh.; Popelis, Yu. Yu.; Shimanskaya, M. V. Journal of Organic Chemistry USSR (English Translation), 1990 , vol. 26, # 8 p. 1545 - 1550 Zhurnal Organicheskoi Khimii, 1990 , vol. 26, # 8 p. 1784 - 1790