1. OECD, International Atomic Energy Agency (IAEA), 2012. Uranium 2011: Resources, Production and demand. OECD Publishing.
2. Recovery of uranium from wet-process phosphoric acid;Hurst;Industrial&EngineeringChemistryProcessDesignandDevelopment,1972
3. Ginisty, C., 1983. “Improved dialkyl phosphoric acid-phosphine oxide synergistic systems for uranium recovery from phosphoric liquors”, ISEC’83, Solvent Extraction (Proc. Int. Conf. Denver, 1983), American Institute of Chemical Engineers, New York (1983), p. 302.
4. New developments in extracting uranium contained in phosphoric acid Urphos bis process Industrie minérale, mines et carrières;Lyaudet;Les techniques,1989
5. Studies on the recovery of uranium from phosphoric acid medium using synergistic mixture of 2-ethyl hexyl hydrogen 2-ethyl hexyl phosphonate and octyl(phenyl)-N,N-diisobutyl carbamoyl methyl phosphine oxide;Singh;Separation Science and Technology,2009