“Study of Adding Ethanol to Gasoline Effects on Produced Noise Intensity of Single Cylinder Spark Ignition Engine”, alkej, vol. 7, no. 2, pp. 83–90, Jun. 2011, Accessed: May 01, 2024. [Online]. Available: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/42