1. Copper USA , “Technology Turns Southwest Waste Into Ore,” E & MJ , Vol. 191 , No. 1 , pp. C41 – 44 ( 1990 ).
2. Thorsen , G. and Monhmius , A. J. “Precipitation of Metal Oxides by Hydrolytic Stripping of Loaded Cation Exchanges in Solvent Extraction,” AIME Annual Meeting , New Orleans , Louisiana ( Feb 12 , 1979 ).
3. Demopoulos , G. and Distin , P. A. “Production of Copper Powder by Reaction Between Hydrogen and Loaded Extractants,” AIME Annual Meeting , Las Vegas , Nevada Feb 24 – 28 ( 1980 ).