1. Kasture AV, Wadodkar SG, Mahadik KK, More HN (2002) A textbook of pharmaceutical analysis and instrumental methods, 8th edn. Pierce Scientific, Rockford, pp 39–47
2. Bhalekar M, Avari JG, Jaiswal SB (2004) Cation-exchanger in pharmaceutical formulation. Indian J Pharm Sci 38:184–187
3. Mantell CL (1951) Ion-exchangers. In: Adsorption. McGraw-Hill, New York, pp 185–216
4. Adams BA, Holmes EL (1935) Synthetic ion-exchange resins. J Soc Chem Ind 54:1T
5. Hughes L, Ion-exchange resin unique solution to formulation problem; pharmaceutical technology Excipients and solid dosage form 2004.
http://www.pharmtech.com/