1. T. Sato, S. Kotani, and O. Terrao,Proceedings of The International Solvent Extraction Conference (ISEC), Lyon, 1974 (Society of Chemical Industry, London, 1974), p. 2249.
2. Henkel Corporation (General Mills, Inc.),Chromium, Technical Bulletin 1?6, 1961.
3. A. S. Kertes, Y. Marcus, and E. Yanir,Equilibrium Constants of Liquid-liquid Distribution Reactions Part III, Alkylammonium Salt Extractants, IUPAC (Butterworths, London, 1974).
4. C. Deptula,J. Inorg. Chem. 30, 1309 (1968).
5. A. Sastre, N. Miralles, and M. Aguilar,Anal. Quim. 546, (1984).