1. Hatch, M.J., Dillon, J.A.: Acid retardation. A simple physical method of separation of strong acids from their salts. I&EC Process Design Dev. 2(4), 253–263 (1963)
2. Gotzelmann, W., Hartinger, L., Gulbass, M.: Stofftrennung und Stoffruckgewinnung mit dem Retardation-Verfaren, Teil.1. Metalloberflache 41(5), 208–212 (1987)
3. Brown, C.J.: Fluid treatment method and apparatus. Patent No. 4673507, US (1987)
4. Ferapontov, N.B., Gorshkov, V.I., Trobov, K.T., Parbuzina, L.R., Gavlina, O.T., Strusovskaya, N.L.: Reagent-free separation of electrolytes on ion exchangers. Russ. J. Phys. Chem. A 70(5), 840–843 (1996)
5. Ferapontov, N.B., Gorshkov, V.I., Trobov, K.T., Parbuzina, L.P., Gavlina, O.T., Strusovskaya, N.L.: Sorption properties of high-basicity anionites at equilibrium with solutions of electrolytes. Russ. J. Phys. Chem. A 70(12), 2072–2077 (1996)