Azhar, Muhammad Izzudin, Azrul Fadzli Mohd Fazri, Amir Khalid, Muhamad Asri Azizul, Shaiful Fadzil Zainal Abidin, Muammar Mukhsin Ismail, and Nofrizalidris Darlis. 2023. “Research on The Ultra-Low Emission Technology in Internal Combustion Engine”. Journal of Automotive Powertrain and Transportation Technology 3 (1): 1-8. https://publisher.uthm.edu.my/ojs/index.php/japtt/article/view/14569.