L. P. Widiastuti, D. F. Salim, and F. T. Kristanti, “Modeling Extreme Risk in Major U.S. Tech Stocks: Integrating GARCH, EVD, and CVaR”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 4, pp. 25334–25340, Aug. 2025.