1. www.who.int/mediacentre/factsheets/fs275/en/print.html.
2. The real cost of counterfeit medicines;Burki;Lancet Infect.,2010
3. http://www.who.int/medicines/services/counterfeit/en/.
4. http://www.who.int/medicines/publications/pharmacopoeia/overview/en/index.html.
5. Brochure European Directorate for the Quality of Medicines and HealthCare, Strasbourg, 2010.