1. Açma , E. , Oktaybaş , C. , Arslan , F. , Addemir , O. , Acarkan , N. , and Önal , G. , 1993 , “ Recovery of copper, cobalt and nickel from divriği sulfide concentrates .” The Paul E. Queneau International Symposium Extractive Metallurgy of Copper, Nicel and Cobalt , Vol. I: Fundamental Aspects , ( R. G. Reddy and R. N. Weizenbach , Eds.), The Minerals, Metals & Material Society , Reno , NV , USA , pp. 1269 – 1295 .
2. Physico-chemical properties of tailing slurries during environmental desulphurization by froth flotation