Beletskaya, I.P.; Gulyukina, N.S.; Ali Ali, Muhamed; Solov'yanov, A.A.; Reutov, O.A. Journal of Organic Chemistry USSR (English Translation), 1987 , vol. 23, # 4 p. 657 - 661 Zhurnal Organicheskoi Khimii, 1987 , vol. 23, # 4 p. 730 - 735