Azizul, Muhamad Asri, et al. “Improvement of Combustion Process and Exhaust Emissions With Premixed Charge Compression Ignition ”. Journal of Automotive Powertrain and Transportation Technology, vol. 2, no. 1, June 2022, pp. 9-25, https://publisher.uthm.edu.my/ojs/index.php/japtt/article/view/11848.