1. Kew Herbarium Catalogue. http://apps.kew.org/herbcat/gotoHomePage.do.
2. Directive 2004/24/EC of the European Parliament and of the Council of 31 March 2004, amending, as regards traditional herbal medicinal products, Directive 2001/83/EC on the Community code relating to medicinal products for human use;The European Parliament and the Council of the European Union;Off J Eur Union,2004
3. Adverse drug reactions and pharmacovigilance of herbal medicines;Barnes,2011
4. The Medicines Act. London: The Stationery Office, 1968.
5. Complementary medicines;Anonymous,1997