Ershov, A. Yu.; Yakimovich, S. I.; Zelenin, K. N.; Zerova, I. V.
Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, # 11 p. 2062 - 2070
Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 11 p. 2287 - 2297