Farida, Ida, and Faurani Santi Singagerda. “Volatilitiy of World Food Commodity Prices and Renewable Fuel Standard Policy”. International Journal of Energy Economics and Policy 11, no. 1 (December 1, 2020): 516–527. Accessed February 2, 2026. https://www.econjournals.com/index.php/ijeep/article/view/10037.