1. Survey Reveals European Views on Counterfeits 2009 http://www.securingpharma.com/40/articles/300.php
2. World Health Organization General information on counterfeit medicines: definition 2009 http://www.who.int/medicines/services/counterfeit/overview/en/
3. Counterfeit drugs and states’ efforts to combat the problem;Catizone;J Pharm Pract,2006
4. Counterfeit phosphodiesterase type 5 inhibitors pose significant safety risks;Jackson;Int J Clin Pract,2010
5. Europa.eu Customs: millions of illegal medicines stopped by ‘MEDI-FAKE’ action 2008 http://europa.eu/rapid/pressReleasesAction.do?reference=IP/08/1980&format=HTML&aged=0&language=en&guiLanguage=en