Os'kina, I. A.; Vlasov, V. M.; Terekhova, M. I.; Petrov, E. S.
Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 11.1 p. 2041 - 2044
Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 11 p. 2261 - 2265