Abaas KI. Comparison of Practical Investigations for CO Emissions Emitted From Single Cylinder S. I. Engine Fueled With Different Kinds of Hydrocarbon Fuels and Hydrogen. alkej. 2019;7(1):22-29. Accessed January 9, 2026. https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/467