1. Cobalt-nickel separation by solvent extraction with bis(2,4,4-trimethylpentyl) phosphinic acid;Rickelton;Solvent Extr. Ion Exch.,1984
2. Metal recovery with monothiophosphinic acids;Rickelton,1991
3. The potential for recovery of cobalt from copper leach solutions;Sole,1991
4. Extraction of nickel by α-hydroxy oxime/carboxylic acid mixtures;Flett,1974
5. Use of liquid cation exchange for separation of nickel(II) and cobalt(II) with simultaneous concentration of nickel sulfate;Nyman,1974