Ismail, Muammar Mukhsin, Mas Fawzi Mohd Ali, Abd Fathul Hakim Zulkifli, and Shahrul Azmir Osman. 2018. “CNG-Diesel Dual Fuel Controlling Concept for Common Rail Diesel”. International Journal of Integrated Engineering 10 (3). https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/2091.