Olujobi, Olusola Joshua, and Olabode Adeleke Oyewunmi. 2017. “Annulment of Oil Licences in Nigeria’s Upstream Petroleum Sector: A Legal Critique of the Costs and Benefits”. International Journal of Energy Economics and Policy 7 (3):364-69. https://econjournals.com./index.php/ijeep/article/view/4576.