1. Identification and Determination of Impurities in Drugs,2000
2. Recent Advances in the Impurity Profiling of Drugs
3. The importance and the challenges of impurity profiling in modern pharmaceutical analysis
4. ICH guideline Q3A (R2), Impurities Testing Guideline: Impurities in New Drug Substances, CPMP/ICH/2737/99, http://ich.org/LoB/media/MEDIA422.pdf.
5. ICH guideline Q3B, Impurities in New Drug Products, CPMP/ICH/2738/99, http://ich.org/LoB/media/MEDIA421.pdf.