1. Cymet process — hydrometallurgical conversion of base–metal sulfides to pure metals;Kruesi;CIM Bulletin,1973
2. New copper process from Cyprus is billed as technological breakthrough;Anon;Engineering and Mining Journal,1977
3. Duval's CLEAR hydrometallurgical process;Schweitzer,1982
4. A nitric acid route in combination with solvent extraction for hydrometallurgical treatment of copper;Bjorling,1976
5. Ammonia oxidation leaching of chalcopyrite — reaction kinetics;Beckstead;Metallurgical Transactions B,1977