Sharanin, Yu. A.; Promomenkov, V. N.; Shestopalov, A. M.; Nestorov, V. N.; Malenchuk, S. N.; et al. Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 3.2 p. 560 - 565 Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 3 p. 622 - 628