1. ICH Harmonisation Guideline Q3A(R2), Impurities in New Drug Substances, 2006.
2. Guideline on the Limits of Genotoxic Impurities, CPMP/SWP/5199/02, 2008.
3. ICH Guideline M7 on Assessment and Control of DNA Reactive (Mutagenic) Impurities in Pharmaceuticals to Limit Potential Carcinogenic Risk, 2014.
4. ICH Harmonisation Guideline M7(R1), Assessment and Control of DNA Reactive (Mutagenic) Impurities in Pharmaceuticals to Limit Potential Carcinogenic Risk, 2017.
5. Kucer, The Use of Antibiotics, M.L. Grayson (eds.), 6pp Edition, Hodder Arnold, pp. 2325–8.