1. Gwatkin DR: Health inequalities and the health of the poor: What do we know? What can we do?. Bulletin of the World Health Organization. 2000, 78 (1): 3-18.
2. Wagstaff A: Socioeconomic inequalities in child mortality: Comparisons across nine developing countries. Bulletin of the World Health Organization. 2000, 78 (1): 19-29.
3. World Health Organization: Global strategy for Health for All by the Year 2000. Geneva. 1981
4. World Health Organization: Priorities for research to take forward the health equity policy agenda. Geneva. 2004
5. Zere E, McIntyre D: Inequities in under-five child malnutrition in South Africa. International Journal for Equity in Health. 2003, 2: 7-10.1186/1475-9276-2-7.