Eltahir, Y., H. O. Osman, O. A. Sallam, and F. Klabi. “Short Run and Long Run Relationships Between Saudi Stocks”. International Journal of Economics and Financial Issues, vol. 9, no. 1, Jan. 2019, pp. 193-6, https://www.econjournals.com/index.php/ijefi/article/view/7391.