1. World Health Organization 2010 Counterfeit Medicines: a Public Health Challenge http://www. who.int/mediacentre/factsheets/fs275/en/index.html
2. World Health Organization 2009 What are Substandard Medicines http://www.who.int/ medicines/services/counterfeit/faqs/06/en/
3. Prevalence and detection of counterfeit pharmaceuticals: A mini review;Fernandez;Ind. Eng. Chem. Res.,2008
4. Counterfeit anti-infective drugs;Newton;Lancet. Infect. Dis.,2006
5. Food and Drugs Administration 2009 FDA Issues Draft Guidance for Industry on Drug Anticounterfeiting http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/2009/ucm171632.htm