Rajesh, R., and A. Satya Nandini. “Hedging Efficiency of Energy Commodities Between Indian and American Commodity Exchanges: Constant and Time-Varying Approaches”. International Journal of Energy Economics and Policy 13, no. 6 (November 10, 2023): 537–546. Accessed May 18, 2024. https://www.econjournals.com/index.php/ijeep/article/view/15062.