A. Perez de los Rios, F. Hernandez Fernandez, S. Sanchez Segado, L. Lozano Blanco, J. Moreno Sánchez, and C. Godinez Seoane, “Selective Separation of Zn(ii) over Fe(iii) from Acidic Media Using Ionic Liquids as Sole Extraction Agents.”, Chemical Engineering Transactions, vol. 21, pp. 625-630, Aug. 2010.