1. W. W. SCHULZ, BNWL-759, 1968.
2. W. W. SCHULZ, Nucl. Technol., 13 (1972) 159.
3. J. E. BIGELOW, F. R. CHATTIN, V. C. A. VAUGHEN, Proc. of the Int. Solv. Ext. Conf. ISEC. Hague, 1971, p. 507.
4. G. KOCH, Z. KOLARIK, W. KUHN, H. H. KUSEL, KFK-1654, 1972, P. 14.
5. R. L. MOORE, L. A. BRAY, F. P. ROBERTS, Solvent Extraction Chemistry of Metals, Macmillan and Co., London, 1965, p. 401.