1. World Health Organization, United Nations Children's Fund, United Nations Population Fund, World Bank Group, United Nations Population Division Trends in Maternal Mortality: 1990 to 2015 2015 http://apps.who.int/iris/bitstream/10665/194254/1/9789241565141_eng.pdf?ua=1
2. Center for Reproductive Rights, Women Advocates Research and Documentation Centre Broken Promises: Human Rights, Accountability and Maternal Death in Nigeria 2008 https://www.reproductiverights.org/sites/crr.civicactions.net/files/documents/pub_nigeria2.pdf
3. Internal Displacement Monitoring Centre Nigeria IDP Figures Analysis http://www.internal-displacement.org/sub-saharan-africa/nigeria/figures-analysis
4. Thomas R 214 Girls Kidnapped by Boko Haram are Free Now-And Pregnant 2015 http://www.mtv.com/news/2154758/Boko-Haram-Pregnant-Girls-Nigeria/