Vinh, N. T., C. D. Hung, D. C. Thanh, N. X. Khoa, and K. T. Ha. “Estimating the Effect of Compression Ratio on Power, Knock, and Emissions of a CNG Engine Converted from a Diesel Engine”. Engineering, Technology & Applied Science Research, vol. 15, no. 3, June 2025, pp. 23443-8, doi:10.48084/etasr.10453.