Gedi, Firas Farhan, and Sabri Nayan. “The Effect of Oil Price Volatility, Board of Directors Characteristics on Firm Performance of Iraq Listed Companies: A Conceptual Framework”. International Journal of Economics and Financial Issues, vol. 8, no. 5, Oct. 2018, pp. 342-50, https://econjournals.com/index.php/ijefi/article/view/6837.