1. Angerer, G., Erdmann, L., Marscheider-Weidemann, F., Lüllmann, A., Scharp, M., Handke, V., Marwede, M., 2009. Rohstoffbedarf für Zukunftstechnologien-Einfluss des branchenspezifischen Rohstoffverbrauchs in rohstoffintensiven Zukunftstechnologien auf die zukünftige Rohstoffnachfrage. Fraunhofer Institut für System- und Innovationsforschung ISI, Institut für Zukunftsstudien und Technologiebewertung IZT GmbH, 384 p.
2. Aon Political Risk Services, 2006. 2006 Political and Economic Risk Map. Aon Group Inc., 〈www.aon.com/politicalrisk〉.
3. Barney, O., (Ed.), 1980. Global 2000—entering the twenty-first century. The report to the president. Council on Environmental Quality and the Department of State, Vol. II, 815 p.
4. British Geological Survey, 1960–2005. World Mineral Statistics. Minerals Programme. British Geological Survey.
5. Brown, W.M., 2002. The meaning of scarcity in the 21st century: drivers and constraints to the supply of minerals using regional, national and global perspectives. Volume IV, Sociocultural and Institutional Drivers and Constraints to Mineral Supply, US Geological Survey Open-File Report 02–333, 121 p.