1. Socio-economic differences in health, nutrition, and population;Gwatkin,2000
2. The familial technique for linking maternal death with poverty;Graham;Lancet,2004
3. A global picture of poor-rich differences in the utilisation of delivery care;Kunst;Studies Health Service Organ Policy,2001
4. Making health systems more equitable;Gwatkin;Lancet,2004
5. The evidence for emergency obstetric care;Paxton;Int J Gynaecol Obstet,2005