1. Basilio, C.I., and Randolph, J.M, 2001, “Process for beneficiation of mixture of mineral particles,” (to Thiele Kaolin Co.), U.S. Patent 6,200,377.
2. Behl, S., and Moudgil, B.M., 1992, “Enhanced selectivity of polymer adsorption in selective flocculation,” Minerals and Metallurgical Processing, Vol. 9, pp. 92–94.
3. Behl, S., Willis, M.J. and Young, R.H. 1996, “Method for separating mixture of finely divided minerals,” (to Engelhard Corp.), U.S. Patent 5,535,890.
4. Bundy, W.M. and Berberich, J.P. 1969, “Kaolin treatment,” (to Georgia Kaolin Co.), U.S. Patent 3,477,809.
5. Chapman, J. H. and Anderson, D., 1980, “Methods of clay benefication,” (to Yara Engineering Corp.), U.S. Patent 4,227,920.