Nguyen VT, Nguyen HT, Huynh TC, Dao HD. A Preliminary Study of Spark-Ignition System for Free-Piston Linear Engine. JTE [Internet]. 2023 Feb. 28 [cited 2026 Apr. 7];18(1):61-8. Available from: https://www.jte.edu.vn/index.php/jte/article/view/1281