Alghifary, M. S., D. Kadji, and I. Hafizah. “Indonesian Stocks’ Volatility During COVID-19 Waves: Comparison Between IHSG and ISSI”. International Journal of Islamic Economics and Finance (IJIEF), vol. 6, no. 1, Jan. 2023, pp. 105-32, doi:10.18196/ijief.v6i1.14838.