Siregar, J. J., Rahman, M. F. and Baharrudin, R. (2024) “Pertamax Quality Improvement with Ethanol on Octane Number, Density and Water Content”, Proceeding International Conference on Religion, Science and Education, 3, pp. 691–697. Available at: https://sunankalijaga.org/prosiding/index.php/icrse/article/view/1054 (Accessed: 9 May 2026).