1. Architectural uses of copper: an evaluation of storm water pollution loads and best management practices. Palo Alto Regional Water Quality Control Plant;Barron,2000
2. Copper Development Association. Copper facts. Available online at: http://www.copper.org/education/c-facts/homepage.html [accessed August 2005].
3. Dimitrova D, Rauch J, Gordon R, Graedel TE. Flows and fates of discarded copper in Sofia, Bulgaria and New Haven, USA, submitted for publication.
4. Metal stocks and sustainability;Gordon;Proc. Nat. Acad. Sci. US,2006
5. The recycling of non-ferrous metals;Henstock,1996