Ly, V. D., Le , T. Q. and Do , T. T. . (2019) “A study of the effects of swirl and tumble ratios on engine performance in motorbike”, Journal of Technical Education Science, 14(3), pp. 58–65. Available at: https://www.jte.edu.vn/index.php/jte/article/view/223 (Accessed: 7 April 2026).