Rehman, Atta Ur, et al. “Dynamic Volatility in Stock Market Returns: An Evidence from Islamic Index and Kse100 Index of Pakistan”. The Journal of Contemporary Issues in Business and Government, vol. 27, no. 2, Apr. 2021, pp. 3811-28, http://www.cibgp.com/index.php/1323-6903/article/view/1289.