"Effect of Ethanol−Gasoline Blends on Fuel Properties Characteristics of Spark Ignition Engines". University of Khartoum Engineering Journal 1, no. 2 (نوفمبر 16, 2022). تاريخ الوصول يوليو 8, 2026. https://onlinejournals.uofk.edu/kuej/article/view/1156.