1. Willingness to pay for medical care evidence from two developing countries: The World Bank 1990;Gertler,1990
2. User charges for health care in principle and in practice;Griffin,1988
3. Debt, adjustment and poverty in developing countries, vol 1: the impact of debt and adjustment at the household level in developing countries;Woodward,1992
4. User charges for health care: a review of recent experience;Creese;Health Policy Plann,1991
5. A price to pay the impact of user charges in Ashanti-Akim district, Ghana;Waddington;Int J Health Plann Manag,1989