Antonovskii, V. L.; Zhitina, L. V.; Emelin, Yu. D.; Komarova, V. I. Journal of Organic Chemistry USSR (English Translation), 1983 , vol. 19, # 4 p. 623 - 626 Zhurnal Organicheskoi Khimii, 1983 , vol. 19, # 4 p. 707 - 710