D. B. Chala and Y. R. Beyene, “Rural Energy Sources and Energy Consumption Pattern in Selected Districts of Jimma and Illubabor Zones, South-western Ethiopia”, IJSBAR, vol. 17, no. 1, pp. 325–329, Oct. 2014, Accessed: Oct. 20, 2025. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/2952