Sembiring KS, Idris M, Hasibuan YM, Harahap UN, Darianto D. Experimental Study on the Calorific Value of Biodiesel from Waste Cooking Oil. IRA J.Tek. Mesin Dan Apl [Internet]. 2024 Dec. 31 [cited 2025 Jul. 9];3(3):95-102. Available from: https://e-journals.irapublishing.com/index.php/IRAJTMA/article/view/160