"Modeling and Forecasting Volatility of Qatar Stock Exchange in light of the blockade and Covid-19 crises Using GARCH Models", renaf, م 18, عدد 30, ص 43–60, يوليو 2025, تاريخ الوصول: أكتوبر 22, 2026. موجود في: https://journals.univ-chlef.dz/index.php/renaf/article/view/266