1. Strategies to increase health facility deliveries: three case studies [ https://globalhealthsciences.ucsf.edu/sites/globalhealthsciences.ucsf.edu/files/pub/pshi-strategies-to-increase-health-facility-deliveries.pdf . Accessed 29 June 2018].
2. UNICEF Data: Monitoring the situation of children and women [ https://data.unicef.org/topic/maternal-health/delivery-care/ ].
3. Trends in Maternal Mortality: 1990-2015: Estimates by WHO, UNICEF, UNFPA, World Bank Group and United Nations Population Division [ https://data.unicef.org/wp-content/uploads/2015/12/Trends-in-MMR-1990-2015_Full-report_243.pdf Accessed 2 July 2018].
4. Nigeria Demographic and Health Survey, 2013-Final Report [ http://dhsprogram.com/publications/publication-FR293-DHS-Final-Reports.cfm Accessed 10 June 2018].
5. Nigeria impact evaluation [ https://www.rbfhealth.org/rbfhealth/country/nigeria Accessed 5 July 2018].