Mixed-ligand chelate extraction of trivalent lanthanides and actinides with 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 and dihexyl-N,N-diethylcarbamoylmethyl phosphonateM. L. P. Reddy; A. D. Damodaran; J. N. Mathur; M. S. Murali; R. H. Iyer · 1995