Afef Ansi. “Intraday Data Processing Approach of Calculating Black and Scholes (1973) Implied Volatility: Calculating Method”. European Economic Letters (EEL) 13, no. 3 (April 13, 2023): 219–234. Accessed April 14, 2026. https://eelet.org.uk/index.php/journal/article/view/241.