Manasseh, C. O., F. C. Abada, J. E. Ogbuabor, O. E. Okoro, A. E. Egele, and K. C. Ozuzu. “Oil Price Fluctuation, Oil Revenue and Well-Being in Nigeria”. International Journal of Energy Economics and Policy, vol. 9, no. 1, Dec. 2018, pp. 346-55, https://www.econjournals.com/index.php/ijeep/article/view/5943.