Reddy Koduru1, J.; Prasanna Lingamdinne2, L.; Chang2, Y.-Y.; Ramach, C. Enhanced Extraction and Separation of Zr(IV) and Hf(IV) from Acidic Chloride Solutions Using 4-Sebacoylbis(1-Phenyl-3-Methyl-5-Pyrazolone) in Presence of Crown Ethers. ajc 2014, 26, 6885-6890.