Padhi, Puja, and Imlak Shaikh. “On the Relationship of Implied, Realized and Historical Volatility: Evidence from NSE Equity Index Options”. Journal of Business Economics and Management 15, no. 5 (November 27, 2014): 915-934. Accessed April 27, 2024. https://journals.vilniustech.lt/index.php/JBEM/article/view/3056.