Ali, M. S. ., and A. . Javed. “Modeling and Forecasting Volatility in Pakistan Stock Exchange”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 54, no. 1, Sept. 2020, pp. 234-41, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/11744.