1. Sourirajan S (1991) Lectures on membrane separations. The Indian Membrane Society, Baroda
2. Seno M, Takagi M, Takeda K et al (1993) Handbook of separation science. Kyoritsu Shuppan Co, Tokyo
3. (1993) IUPAC compendium of chemical technology, 2nd edn, vol 65, p 856
4. Juda W, McRae WA (1950) Coherent ion-exchange gels and membranes. J Am Chem Soc 72:1044
5. Ostwald W (1890) Elektrische eigenschaften halbdurchlässiger scheidewände. J Phys Chem 6:71–82