Alexandri, Mohammad Benny, and Supriyanto Supriyanto. “The Influence of Oil Price Volatility and Price Limit in Indonesia Energy Sub-Sector for the Period Before and After Covid-19”. International Journal of Energy Economics and Policy, vol. 11, no. 5, Aug. 2021, pp. 538-44, https://econjournals.com./index.php/ijeep/article/view/11557.