1. Nomenclature of inorganic chemistry: IUPAC recommendations 2005;Connelly,2005
2. The rare-earth elements: vital to modern technologies and lifestyles;Van Gosen,2014
3. US Geological Survey 2007 minerals yearbook: rare earths;Hedrick,2007
4. A review of the beneficiation of rare earth element bearing minerals;Jordens;Minerals Engineering,2013
5. Rare earths supply chains: Current status, constraints and opportunities;Golev;Resources Policy,2014