M. M. Ismail, M. Fawzi, L. Theerayut, F. H. Zulkifli, S. A. Osman, and J. Taweekun, “Energy Consumption and Emissions of Diesel-CNG Dual Fuel Engine at High Load Operation”, IJIE, vol. 12, no. 2, pp. 253–260, Mar. 2020, Accessed: Apr. 08, 2026. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2764