“Study of NOx Emissions of S.I. Engine Fueled With Different Kinds of Hydrocarbon Fuels and Hydrogen”. Al-Khwarizmi Engineering Journal 6, no. 2 (June 1, 2010): 11–20. Accessed November 21, 2024. https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/485.