LY VINH DAT; TRAN XUAN DUNG. A study on valve timing optimization in si engines. Journal of Technical Education Science, [S. l.], v. 12, n. 4, p. 29–36, 2017. Disponível em: https://www.jte.edu.vn/index.php/jte/article/view/518. Acesso em: 7 apr. 2026.