Sahbudin, Muhammad, Wawan Hermawan, and Agus Sutejo. “Optimization of Used Engine Oil Furnace Design With Initial Heater”. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) 13, no. 4 (November 25, 2024): 1237–1248. Accessed November 26, 2025. https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/9203.