1. Committee for Medicinal Products (CHMP), European Medicines Agency 2006 Guideline on the limits of genotoxic impurities
2. U.S. Department of Health and Human Services, Food and Drug Administration, Center for Drug Evaluation and Research (CDER) 2008 Guidance for industry. Genotoxic and carcinogenic impurities in drug substances and products: Recommended approaches
3. Enquiry: Alkyl mesilate (methanesulfonate) impurities in mesilate salts;EDQM;PharmEuropa,2000