1. Avalon, 2010. Corporate Presentation, Avalon Rare Metals. Available at: 〈http://avalonraremetals.com/ investors/ presentations/〉.
2. Bauer, D., Diamond, D., Li, J., Sandalow, D., Telleen, P., Wanner, B., 2010. Critical Materials Strategy, Department of Energy, USA. Available at: 〈http://www.energy.gov/news/ documents/criticalmaterialsstrategy.pdf〉.
3. Bauer, D., Diamond, D., Li, J., McKittrick, M., Sandalow, D., Telleen, P., 2011. Critical Materials Strategy, Department of Energy, USA.
4. Centre for Policy Related Statistics (CPRS), 2010. Critical materials in the Dutch economy.
5. European Commission (EC), 2007a. European Council conclusions adopted on the basis of the Commission’s Energy Package, e.g. the Communications: An Energy Policy for Europe COM(2007)1, Limiting Global Climate Change to 2 degrees Celsius—The way ahead for 2020 and beyond COM(2007)2 and A European Strategic Energy Technology plan (SET-Plan)—Towards a low carbon future COM(2007)723.