1. Impact of user fees on maternal health service utilization and related health outcomes: A systemic Review;S Dzakpasu,2014
2. The equity impacts of community financing activities in three African countries;L Gilson,2000
3. Are user charges efficiency- and equity-enhancing? A critical review of economic literature with particular reference to experience from developing countries;A Sepehri,2001
4. Out-of-pocket costs for facility-based maternity care in three African countries;M Perkins,2009
5. User fee exemptions and equity in access to caesarean sections: an analysis of patient survey data in Mali;M El-Khoury,2012