1. 1 BP: BP Statistical Review of World Energy 2021: 70th edition, (BP, London, 2021), p.19. https://www.bp.com/content/dam/bp/business-sites/en/global/corporate/pdfs/energyeconomics/statistical-review/bp-stats-review-2020-full-report.pdf
2. 2 World Bank: The World Bank Data, Country Profile, Nigeria (World Bank, Washington D.C., 2021), https://databank.worldbank.org/views/reports/reportwidget.aspx?Report_Name=CountryProfile&Id=b450fd57&tbar=y&dd=y&inf=n&zm=n&country=NGA
3. 3 UNDP: Niger Delta Human Development Report (UNDP, New York, 2006), https://hdr.undp.org/sites/default/files/nigeria_hdr_report.pdf
4. 4 Human Right Watch: The Niger Delta: No Domestic Dividend, (Human Right Watch, New York, 2002), pp.23-25.
5. 5 C. Obi and S. A. Rustad: Oil and Insurgency in the Niger Delta: Managing the Complex Politics of Petro-Violence, (Zed Books, London, 2011), pp.42-54.