Alkayed, Hani, Ibrahim Yousef, and Ola Zalmout. “The Impact of COVID-19 on the Volatility of BRICS Stock Returns”. Asian Economic and Financial Review 12, no. 4 (April 20, 2022): 267–278. Accessed May 2, 2024. http://archive.aessweb.com/index.php/5002/article/view/4470.