Yang Liu, Day, Ming Chen Chun, and Yi Kai Su. “The Impacts of Covid-19 Pandemic on the Smooth Transition Dynamics of Stock Market Index Volatilities for the Four Asian Tigers and Japan”. International Journal of Research in Business and Social Science (2147- 4478) 10, no. 4 (June 14, 2021): 183–194. Accessed October 27, 2021. https://www.ssbfnet.com/ojs/index.php/ijrbs/article/view/1177.