Ahmed, S.T. and Chaichan, M.T. (2012) “Effect of Fuel Cetane Number on Multi-Cylinders Direct Injection Diesel Engine Performance and Exhaust Emissions”, Al-Khwarizmi Engineering Journal, 8(1), pp. 65–75. Available at: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/106 (Accessed: 4 January 2026).