Özer Ören, and Cem Şensöğüt. “Comparison of Present Coal and Renewable Energy Sources in Turkey”. International Journal of Economic and Environmental Geology 9, no. 2 (April 20, 2018): 26–34. Accessed December 21, 2025. https://www.econ-environ-geol.org/index.php/ojs/article/view/652.