1. WHO, UNICEF, UNFPA, The World Bank Maternal mortality in 2005: Estimates developed by WHO, UNICEF, UNFPA and the World Bank 2007 http://www.who.int/making_pregnancy_safer/documents/9789241596213/en/index.html
2. WHO analysis of causes of maternal death: a systematic review;Khan;Lancet.,2006
3. 55/2 United Nations Millennium Declaration 2000 http://mdgs.un.org/unsd/mdg/Resources/Static/Products/GAResolutions/55_2/a_res55_2e.pdf
4. International Women's Day 2010;Lancet,2010
5. UN Millennium Development Goals: 2010 progress chart 2010 http://mdgs.un.org/unsd/mdg/Resources/Static/Products/Progress2010/MDG_Report_2010_Progress_Chart_En.pdf