1. Global report: UNAIDS report on the global AIDS epidemic,2013
2. What is HIV/AIDS? AIDS.gov. Available at: http://aids.gov/hiv-aids-basics/hiv-aids-101/what-is-hiv-aids/ [accessed 30.10.13].
3. Centres for Disease Control and Prevention. Surveillance brief: terms, definitions, and calculations used in CDC HIV surveillance publications. Available at: http://www.cdc.gov/hiv/pdf/statistics_recommendations_terms.pdf [accessed 31.10.13].
4. Joint United Nations Programme on HIV/AIDS (UNAIDS) and United Nations Children Fund (UNICEF). Towards universal access: scaling up priority HIV/AIDS interventions in the health sector: progress report 2008;World Health Organization,2008
5. Joint United Nations Programme on HIV/AIDS (UNAIDS) and United Nations Children Fund (UNICEF). Towards universal access: scaling up priority HIV/AIDS interventions in the health sector: progress report 2009;World Health Organization,2009