1. The Chemistry of Activation, Deactivation and Depression in Flotation of Zinc Sulfide;Finkelstein,1976
2. Activation of Sphalerite with Lead Ions in the Presence of Zinc Salts;Fuerstenau;Trans. AIME,1960
3. Activation and Deactivation Studies with Copper and Sphalerite;Gaudin;Trans. AIME,1959
4. Activation in the Flotation of Sphalerite;Jain,1985
5. An Electrochemical Study of Sphalerite Activation by Copper in Acid Solution;Yoon,1995