1. Silver; Economics, Metallurgy and Use;Schack,1967
2. Processing of secondary raw materials for recovery of gold and silver;Cornelius;Erzmetall,1979
3. Production of silver from raw materials and recycled materials;Kurzeja;Wiad. Hutn.,1980
4. Hydrometallurgical process for the recovery of valuable components from anode slime produced in electrolytical refining of copper;Heimala,1977
5. Hydrometallurgy of domestic copper raw materials;Łȩtowski,1979