Mphanza, Victor, Glasswell Kayula Nkonde, Tinah Phiri, and James Mulwanda. 2016. “Test Works on Concentrate Grade Improvement Using Mineral Depressants”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 26 (3): 60-65. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/5223.