1. Recovery of zinc from oxidized ore by direct leaching with sulfuric acid;Caiqiao,1988
2. Quick leach of silicious zinc ore;Dufresne;J. Met.,1967
3. How zinc concentrates are processed at the Outokumpu zinc plant in Kokkola;Huggare,1973
4. Direct leaching of oxidised zinc ore;Abdel-Aal,1997
5. Leaching of Scheelite by hydrochloric acid in the presence of phosphate;Xuin;Hydrometallurgy,1986