1. WHO. (2000). Health Systems: Improving Performance. The World Health Report 2000 (2000). http://refhub.elsevier.com/S0033-3506(19)30235-5/sref1
2. WHO. The World Health Report: Health Systems Financing: the Path to Universal Coverage (2010). https://apps.who.int/iris/handle/10665/44371
3. World Health Organizations (WHO). Monitoring the building blocks of health systems: A handbook of indicators and their measurement strategies (2010, January 1). https://apps.who.int/iris/handle/10665/258734
4. O’Donnell, O., van Doorslaer, E., Wagstaff, A., Lindelow, M.: Analyzing health equity using household survey data: A guide to techniques and their implementation (2008, January 1). http://hdl.handle.net/10986/6896
5. World Bank. Health equity and financial protection in Ghana (2012, May 21). http://hdl.handle.net/10986/27067