“Performance and Exhaust Emissions of Four Stroke Gasoline Engine Variations of Injection Duration Mapping With Ethanol Fuel E75”. ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK 15, no. 1 (May 30, 2025): 109–120. Accessed August 11, 2025. https://e-journal.upm.ac.id/index.php/energy/article/view/energy.v15i1.15110.