Ozdurak, Caner, and Veysel Ulusoy. “Price Discovery in Crude Oil Markets: Intraday Volatility Interactions Between Crude Oil Futures and Energy Exchange Traded Funds”. International Journal of Energy Economics and Policy, vol. 10, no. 3, Mar. 2020, pp. 402-13, https://econjournals.com./index.php/ijeep/article/view/9014.