Andreev, S. A.; Lebedev, B. A.; Tselinskii, I. V. Journal of Organic Chemistry USSR (English Translation), 1980 , vol. 16, # 7 p. 1170 - 1174 Zhurnal Organicheskoi Khimii, 1980 , vol. 16, # 7 p. 1365 - 1370