1. Mineral Commodity Summaries 2016;U.S.G.S.,2016
2. G.B. Abaka-Wood, J. Addai-Mensah, W. Skinner, Review of flotation and physical separation of rare earth element minerals, in: Proc. 4th UMaT Biennial International Mining and Minerals Conference, Tarkwa, Ghana, 2016, MR 55–62.
3. A review of the beneficiation of rare earth element bearing minerals;Jordens;Miner. Eng.,2013
4. Geoscience-Australia, Australia’s Identified Mineral Resources 2013, Geoscience Australia: Canberra, 2014, pp.107–115.
5. The Olympic Dam copper-uranium-gold deposit, Roxby Downs, South Australia;Roberts;Econ. Geol.,1983