1. Personal communication;Askew,2003
2. Relationships between environmental impacts and added value along the supply chain;Clift;Technol Forecast Soc Change,2000
3. Eco-efficiency trends in the UK steel and aluminium industries: differences between resource efficiency and resource productivity;Dahlström;J Ind Ecol,2005
4. Dahlström K, Ekins P, He J, Davis J, Clift R. Iron, steel and aluminium in the UK: material flows and their economic dimensions. Final project report, March 2004. Joint working paper. London: Centre for Environmental Strategy, University of Surrey, Guildford/Policy Studies Institute; 2004.
5. Davis J. Closing the cycles of iron, steel and aluminium in the UK—on recycling rates, scrap quality and collection of dispersed scrap. Ph.D. thesis. Centre for Environmental Strategy, University of Surrey, unpublished; 2004.