Karaaslan, Abdulkerim, and Mesliha Gezen. “Forecasting of Turkey’s Sectoral Energy Demand by Using Fuzzy Grey Regression Model”. International Journal of Energy Economics and Policy, vol. 7, no. 1, Jan. 2017, pp. 67-77, https://econjournals.com./index.php/ijeep/article/view/2759.