1. B. Weaver ,Ion-Exchange and Solvent Extraction, Edited by J. A. Marinsky and Y. Marcus ( Marcel Dekker, New York ) p. 196 ( 1974 ).
2. E. K. Hulet and D. D. Bode ,Separation Chemistry of Lanthanides and Transplutonium Actinides, Vol. 7, Lanthanides and Actinides, Edited by H. J. Emelius and K. W. Bangall ( MTP International Review of Science, Butterworths, London ) p. 145 ( 1972 ).
3. J. E. Powell ,Separation Chemistry in Handbook of Physics and Chemistry of Rare Earths, Edited by K. A. Gschneidner and L. Eyring ( North Holland Physics Publishers ) p. 81 ( 1979 ).
4. L. Sherrington ,Commercial Processes for Rare Earths and Thorium in Handbook of Solvent Extraction, Edited by T. C. Lo , M. H. I. Baird and C. Hanson ( Wiley Interscience, New York ) p. 717 ( 1983 ).
5. G. M. Ritcey and A. W. Ashbrook , Solvent Extraction Part II ( Elsevier , New York ) p. 386 ( 1979 ).