Mirskova, A.N.; Kryukova, Yu.I.; Levkovskaya, G.G.; Guseva, S.A.; Voronkov, M.G. Journal of Organic Chemistry USSR (English Translation), 1984 , vol. 20, # 3 p. 545 - 550 Zhurnal Organicheskoi Khimii, 1984 , vol. 20, # 3 p. 602 - 608