Popov, A. F.; Kravchenko, V. V.; Kostenko, L. I.; Kotenko, A. A.; Kovach, N. A.
Journal of Organic Chemistry USSR (English Translation), 1986 , vol. 22, # 10 p. 1915 - 1917
Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 10 p. 2135 - 2138
Pelter, Andrew; Rosser, Richard M.; Mills, Stuart
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1984 , # 4 p. 717 - 720