1. A. S. Solovkin, Zh. Neorgan. Khim.,15, 1914 (1970).
2. J. Woodhead, J. Inorg. Nucl. Chem.,26, 1472 (1964).
3. A. S. Solovkin, Salting Out and Quantitative Description of Extraction Equilibria [in Russian], Atomizdat, Moscow (1969).
4. A. S. Solovkin, Zh. Neorgan. Khim.,16, 272 (1971).
5. A. G. Rykov, V. Ya. Vasil'ev, and N. B. Blokhin, Radiokhimiya,12, 711, 717 (1970).