Biru Birhanu, and Prof. Rajendiran Gopal. “Investigation of Performance and Emission Characteristics of Diesel-Ethanol PCCI Engine ”. International Journal of Research in Science & Engineering 2, no. 01 (January 24, 2022): 25–40. Accessed November 2, 2025. https://journal.hmjournals.com/index.php/IJRISE/article/view/3334.