silalahi, surya, Dalil Sazidin, Qodry, Fernando Riauwanta Pinem, and M. Jhon Andyka Putra. 2026. “Experimental Study of Small-Scale Stirling Engine Performance Using Waste Cooking Oil As an Alternative Heat Energy Source for Energy Conversion Systems”. International Journal of Energy Systems and Materials Innovation 1 (3):109-16. https://journal.gioedutech.id/index.php/IJESMI/article/view/40.