YAOM, P.; WATECHAGIT, S. Relationship between the variations of hydrogen in HCNG fuel and the oxygen in exhausted gas. Engineering and Applied Science Research, [S. l.], v. 42, n. 3, p. 263–268, 2015. Disponível em: https://ph01.tci-thaijo.org/index.php/easr/article/view/38305. Acesso em: 19 may. 2024.