Hussein, Muhammad, and Muhammad Idris. “Experimental Studies of Flame Points and Biodiesel Viscosity Produced from Waste Cooking Oil”. IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) 3, no. 1 (April 30, 2024): 86–92. Accessed July 11, 2025. https://e-journals.irapublishing.com/index.php/IRAJTMA/article/view/101.