Narantoko, Resi Aji, Abrar Riza, and Harto Tanujaya. “Analysis of Dual Combustion of Natural Gas and Biodiesel Fuels in a Single Cylinder Diesel Engine: Thermal Efficiency and Performance Study”. IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) 4, no. 2 (August 4, 2025): 17–25. Accessed August 16, 2025. http://e-journals.irapublishing.com/index.php/IRAJTMA/article/view/219.