1. Abrahamsen, R. (2005). Blair’s Africa: The politics of Securitization and Fear. Alternatives, 30, 55–80.
2. Abrahamsen, R., & Williams, M. (2005). The Globalisation of Private Security: Country Report: Nigeria. Aberystwyth: University of Wales Press.
3. Abubakar, D. (2017). From Sectarianism to Terrorism in Northern Nigeria: A Closer Look at Boko Haram. In Caroline Varin & Dauda Abubakar (Eds.), Violent Non-State Actors in Africa. London: Palgrave Macmillan.
4. Akinleye, A. (2013, January 15). Nigeria’s Thieves Say Government Leaves Them No Choice, in: Reuters, Online: www.reuters.com/article/2013/01/15/us-nigeria-oil-theft-idUSBRE90E0D020130115. Accessed 2 May 2020.
5. Baker, D. P. (2011). Will Global Demand for Private Military Services in Major Conflicts Continue? In Sabelo Gomedze (Ed.), Merchants of African Conflicts, More Than Just a Pound of Flesh. Pretoria. Institute for Security Studies (ISS) Monograph 176.