Alghifary, Muhammad Syauqy, Dzuliyati Kadji, and Iffah Hafizah. “Indonesian Stocks’ Volatility During COVID-19 Waves: Comparison Between IHSG and ISSI”. International Journal of Islamic Economics and Finance (IJIEF) 6, no. 1 (January 31, 2023): 105–132. Accessed September 4, 2025. https://journal.umy.ac.id/index.php/ijief/article/view/14838.