Azizul MA, Qabli Osman MK, Khalid A, et al. Improvement of Combustion Process and Exhaust Emissions with Premixed Charge Compression Ignition . JAPTT. 2022;2(1):9-25. Accessed August 12, 2026. https://journal.uthm.edu.my/index.php/japtt/article/view/11848