1. World Health Organization. Equitable access to essential medicines: a framework for collective action. WHO Policy Perspect Med. http://apps.who.int/iris/handle/10665/68571 . Accessed 13 Mar 2015.
2. Mendis S, Fukino K, Cameron A, Laing R, Filipe A, Khatib O, et al. The availability and affordability of selected essential medicines for chronic diseases in six low- and middle-income countries. Bull World Health Organ. 2007;85:279–88.
3. Leisinger KM, Garabedian LF, Wagner AK. Improving access to medicines in low and middle income countries: corporate responsibilities in context. Southern Med Review. 2012;5(2):3–8.
4. Syhakhang L, Sengaloundeth S, Paphassarang C, Freudenthal S. Availability of essential drugs and sustainability of village revolving drug funds in remote areas of Lao PDR. Stud HSO&P. 2008;519–43.
5. United Nations. Millennium Development Goal 8. Delivering on the Global Partnership for Achieving the Millennium Development Goals. New York: MDG Gap Task Force Report 2008; 2008.