kota, Muhammad shahfirul bin, and Abd Fathul Hakim Zulkifli. 2021. “Prediction on Combustion Pattern of CNG-Diesel Duel Fuel Engine Using Response Surface Methodology”. Progress in Engineering Application and Technology 2 (2):1060-78. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/702.