Kron, A. A.; Cherkaev, G. V.; Aul'chenko, I. S.
Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 11.1 p. 2078 - 2080
Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 11 p. 2302 - 2305