1. Parkhurst JO, Penn-Kekana L, Blaauw D, Balabanova D, Danishevski K, Rahman SA, Onama V, Ssengooba F: Health systems factors influencing maternal health services: a four-country comparison. Health Policy. 2005, 73 (2): 127-138. 10.1016/j.healthpol.2004.11.001.
2. World Health Organization: Packages of interventions for family planning, safe abortion care, maternal, newborn and child health. 2010, Geneva: WHO
3. World Health Organization: Trends in maternal mortality: 1990–2008. Estimates developed by WHO, UNICEF, UNFPA and The World Bank. 2010, Geneva: WHO
4. World Health Organization: World health statistics. 2010, http://www.who.int/whosis/whostat/EN_WHS10_Full.pdf .
5. The World Bank: World Bank online data. http://data.worldbank.org/indicator/ .