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Journal of Organic Chemistry USSR (English Translation), 1991 , vol. 27, # 7 p. 1359 - 1362
Zhurnal Organicheskoi Khimii, 1991 , vol. 27, # 7 p. 1552 - 1556

Mirskova, A. N.; Levkovskaya, G. G.; Bryuzgin, A. A.; Drozdova, T. I.; Kalikhman, I. D.; Voronkov, M. G.
Journal of Organic Chemistry USSR (English Translation), 1990 , vol. 26, # 1.2 p. 119 - 125
Zhurnal Organicheskoi Khimii, 1990 , vol. 26, # 1 p. 140 - 147