Vovk, M. V.; Dorokhov, V. I.; Samarai, L. I.
Journal of Organic Chemistry USSR (English Translation), 1989 , vol. 25, # 4.1 p. 675 - 679
Zhurnal Organicheskoi Khimii, 1989 , vol. 25, # 4 p. 754 - 759