Girma, Paul Berhanu. “Do Heating Oil Prices Adjust Asymmetrically To Changes In Crude Oil Prices”. Journal of Business & Economics Research (JBER) 9, no. 7 (June 23, 2011): 1–8. Accessed July 17, 2024. https://clutejournals.com/index.php/JBER/article/view/4676.