IMPROVING LEAN BURN CNG ENGINE EFFICIENCY WITH LASER SPARK IGNITION. International journal of mechanical engineering, [S. l.], v. 4, n. 01, p. 17–20, 2024. Disponível em: https://www.academicpublishers.org/journals/index.php/ijme/article/view/1303.. Acesso em: 5 oct. 2025.