1. K.J. Bayer, Process of obtaining alumina, Patent in 3 jurisdictions: Britain 10093; USA 382505; Germany 43977, 1888.
2. K.J. Bayer, Process of making alumina, Patent in 3 jurisdictions: Britain 5296; USA 515895; Germany 65604, 1894.
3. Ore forming processes related to lateritic weathering;Freyssinet,2005
4. Analysis of the overall energy intensity of alumina refinery process using unit process energy intensity and product ratio method;Liu;Energy,2006