Makin, S. M.; Markina, T. A.; Boiko, I. I.
Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, # 11 p. 2182 - 2187
Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 11 p. 2419 - 2424

McGookin; Sinclair
Journal of the Chemical Society, 1928 , p. 1175

McGookin; Sinclair
Journal of the Chemical Society, 1928 , p. 1175