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3. Studies on the flotation of sulphides I. The effect of CU(II) ions on the flotation of zinc sulphide;Baldwin;Int. J. Miner. Process.,1979
4. Lead activation of sphalerite during galena flotation;Basilio;Miner. Eng.,1996
5. Kinetics of adsorption of copper on zinc blende;Bazanova;Obogashchemie Rud,1961