David-Wayas, Onyinye Maria, et al. “Oil Price Volatility and Macroeconomic Performance in Nonoil Exporting Countries in Sub-Saharan Africa”. International Journal of Energy Economics and Policy, vol. 11, no. 3, Apr. 2021, pp. 221-30, https://econjournals.com.tr/index.php/ijeep/article/view/11140.