Increasing the efficiency of the internal combustion engine using chemical additives. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 1, p. 139–146, 2021. DOI: 10.21533/pen.v9.i1.718. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/718. Acesso em: 8 oct. 2025.