1. Recovery and removal of elemental phosphorus from electric furnace sludge;Anazia,1991
2. Principles of nonmetallic mineral flotation;Aplan,1962
3. Effect of inorganic acids on fatty acid flotation of calcareous phosphate;Belash;Chem. Abstr.,1962
4. The point of zero charge of hydroxyapatite and fluorapatite in aquous solutions;Bell;J. Colloid Interface Sci.,1973
5. Ionic Equilbrium: A Mathematical Approach;Butler,1964