Rubinov, D. B.; Rubinova, I. L.; Lakhvich, F. A. Journal of Organic Chemistry USSR (English Translation), 1992 , vol. 28, # 1.1 p. 79 - 87 Zhurnal Organicheskoi Khimii, 1992 , vol. 28, # 1 p. 95 - 103