Özdemir, L., OZEN, E., Grima, S. . and 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. Iasi, Romania, 68(4), pp. 405–419. doi: 10.47743/saeb-2021-0022.