1. G. Matos, L. Wagner: Consumption of materials in the United States 1900-1995, Annu. Rev. Energy Environ. 23, 107–122 (1998)
2. T. Kelly, D. Buckingham, C. DiFrancesco, K. Porter, T. Goonan, J. Sznopek et al.: Historical Statistics for Mineral and Material Commodities in the United States. US Geological Survey, Open-File Report, 01-006, Reston (2004)
3. W D. Menzie, J. H. DeYoung, W. G. Steblez: Some Implications of changing patterns of minerals consumption. US Geological Survey, Open-File Report, 03-382, Reston (2000)
4. T. E. Graedel, B. R. Allenby: Design for the Environment (Prentice Hall, Upper Saddle River 1998)
5. A. K. Bhaktavatsalam, R. Choudhury: Specific energy consumption in the steel industry, Energy Fuels 20(12), 1247–1250 (1995)