FELTON, J.; MCLAUGHLIN, D.; YOO, W. The Impact of COVID-19 on Commodity and S&P 500 Sector Return Volatility. Journal of Applied Business and Economics, [S. l.], v. 26, n. 3, 2024. Disponível em: https://articlearchives.co/index.php/JABE/article/view/7015. Acesso em: 11 oct. 2025.