1. Copper smelters and refineries;AME,2010
2. Chinese copper industry in 2010–2015. Industry Report;Antaike,2009
3. Copper, the science and technology of the metal, its alloys and compounds;Butts,1954
4. Copper in the USA: Bright future, glorious past;Copper Development Association,2010
5. Copper and copper alloy consumption in the United States by functional use – 2009;Copper Development Association,2010