1. Identification and Determination of Impurities in Drugs,2000
2. Identification and Determination of Impurities in Drugs,2000
3. Impurities Evaluation of Pharmaceuticals;Ahuja,1998
4. Handbook of Isolation and Characterization of Impurities in Pharmaceuticals,2003
5. International Conference on Harmonisation, Q1A(R2), November 2003.