Nguyen, V.T., Nguyen, H.T., Huynh, T.C. and Dao, H.D. 2023. A Preliminary Study of Spark-Ignition System for Free-Piston Linear Engine. Journal of Technical Education Science. 18, 1 (Feb. 2023), 61–68. DOI:https://doi.org/10.54644/jte.75A.2023.1281.