Abubakr Badeeb, R., and H. H. Lean. “Assessing the Asymmetric Impact of Oil Price on Islamic Stocks in Malaysia: New Evidence from Non-Linear Ardl”. The Journal of Muamalat and Islamic Finance Research, vol. 13, no. 2, Dec. 2016, pp. 19-29, https://jmifr.usim.edu.my/index.php/jmifr/article/view/27.