Gohar, R., S. Z. A. Shah, and H. Ahmad. “Economic Integration and Stock Market Comovement: An Empirical Study Pairing Pakistan’s Stock Exchange With 21 Other Markets”. Journal of Reviews on Global Economics, vol. 7, Mar. 2018, pp. 28-36, https://mail.lifescienceglobal.com/pms/index.php/jrge/article/view/5273.