Özdemir, L., OZEN, E., Grima, S. ., & Romānova, I. . (2021). Determining the Return Volatility of Major Stock Markets Before and During the COVID-19 Pandemic by Applying the EGARCH Model. Scientific Annals of Economics and Business, 68(4), 405–419. https://doi.org/10.47743/saeb-2021-0022