Gebisa, Amanuel, Girma Gebresenbet, Rajendiran Gopal, and Ramesh Babu Nallamothu. “Assessment on the Impacts of Vehicle Speed and Slope on Tailpipe Emissions Using Desirability Function Analysis”. Ethiopian Journal of Science and Sustainable Development 11, no. 1 (February 25, 2024): 1–15. Accessed October 10, 2026. https://www.ajol.info/index.php/ejssd/article/view/265682.