Study of Multiple Spark Ignition Engines with Single Spark Ignition Engines on the Basis of Engine Efficiency and Emission Characteristics Size. International Journal of Current Engineering and Technology, [S. l.], v. 1, n. 3.Special Issue, p. 14–17, 2014. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/3863. Acesso em: 10 jun. 2026.