1. R.P. Pawlek, Light Metal Age, 66(2) (2008), p. 6.
2. Life Cycle Inventory Report for the North American Aluminum Industry, Report AT-2 (Arlington, VA: Aluminum Association, 1998).
3. John A.S. Green, editor, Aluminum Recycling and Processing for Energy Conservation and Sustainability, ASM Sourcebook (Materials Park, OH: ASM International, 2007).
4. Internatioinal Aluminum Institute, London, www.worldaluminium.org.
5. In John A.S. GreenRef. 3, Chapter 10, p. 158.