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2. W. Rieman and H. Walton, Ion Exchange in Analytical Chemistry, Pergamon, New York, 1970.
3. M. Marhol, Ion Exchangers in Analytical Chemistry, Academia, Prague, 1982.
4. V. G. Sinyavskii, Selektivnye ionity [Selective Ion-Exchange Resins], Tekhnika, Kiev, 1967, 167 pp. (in Russian).
5. H. Leinonen and J. Lehto, React. Polym., 2000, 43, 1.