1. Progress of WHO member states in developing national drug policies and in revising essential drugs lists (WHO/DAP/98.7);Habiyambere,1998
2. WHO. WHO Model lists of essential medicines. Accessed July 2010, at: http://www.who.int/medicines/publications/essentialmedicines/en/.
3. WHO. 16th WHO Model list of essential medicines (adults). Accessed July 2010, at: http://www.who.int/entity/medicines/publications/essentialmedicines/Updated_sixteenth_adult_list_en.pdf.
4. Equitable access to essential medicines: A framework for collective action;WHO,2004
5. CPTech. Background information on fourteen HIV/AIDS drugs. Consumer Project on Technology (now operating under a new name, Knowledge Ecology International). Accessed July 2010, at: http://www.cptech.org/ip/health/sa/loveaffidavit/table11.doc.