1. WHO. World health statistics 2014. Switzerland: WHO Press; 2014.
2. Balick MJ. Transforming ethnobotany for the new millennium. Ann Missouri Bot Gard. 1996;83:58–66.
3. Akerele O. WHO’s traditional medicine programme, progress and perspectives. WHO Chron. 1984;38:76–81.
4. Balick MJ, Cox PA. Ethnobotanical research and traditional healthcare in developing countries. In: Bodeker G, Bhat KKS, Burley J, Vantomme P, editors. Medicinal Plant for Forest Conservation and HealthCare. Rome: Food and Agriculture Organization of the United Nation; 1997.
5. Anderson EF. Plants and people of the golden triangle. Hong Kong: Dioscorides Press; 1993.