S. T. Ahmed and M. T. Chaichan, “Effect of Fuel Cetane Number on Multi-Cylinders Direct Injection Diesel Engine Performance and Exhaust Emissions”, alkej, vol. 8, no. 1, pp. 65–75, Feb. 2012, Accessed: Jan. 04, 2026. [Online]. Available: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/106