ALI, H. S., M. IDRIS, and Y. I. KOFARMATA. “Stock Prices and Exchange Rates Dynamics in South Africa: An Application of Asymmetric Co-Integration Approach”. Journal of Economics Library, vol. 2, no. 3, Sept. 2015, pp. 165-72, https://journals.econsciences.com/index.php/JEL/article/view/429.