1. Solvent extraction and separation of Bi(III) and Sb(III) from HCl and HBr media using tri-n-octyl phosphine oxide (TOPO);Ali;Ind. J. Chem. Technol.,2001
2. Solvent extraction of molybdenum and tungsten by Alamine 336 and DEHPA;Coca;Hydrometallurgy,1990
3. The Chemistry of Rhenium and Technetium;Colton,1965
4. Impurity removal from copper tankhouse liquors by solvent extraction;Cox,2002
5. Extraction of tungsten (VI), molybdenum (VI) and rhenium (VII) by diisododecylamine;Gerhardt;Hydrometallurgy,2000