Krasnov, V.L.; Vasyanina, G.I.; Bodrikov, I.V.
Journal of Organic Chemistry USSR (English Translation), 1991 , vol. 27, # 7 p. 1359 - 1362
Zhurnal Organicheskoi Khimii, 1991 , vol. 27, # 7 p. 1552 - 1556