SIREGAR, J. J.; RAHMAN, M. F.; BAHARRUDIN, R. Pertamax Quality Improvement with Ethanol on Octane Number, Density and Water Content. Proceeding International Conference on Religion, Science and Education, [S. l.], v. 3, p. 691–697, 2024. Disponível em: https://sunankalijaga.org/prosiding/index.php/icrse/article/view/1054. Acesso em: 9 may. 2026.