1. R. Mikalsen and A. P. Roskilly, A review of free-piston engine history and applications. Applied Thermal Engineering, vol. 2007.03.015.
2. Multi-dimensional scavenging analysis of a free-piston linear alternator based on numerical simulation;Mao;Applied Energy,2011
3. Rectangular Current Commutation and Open-Loop Control for Starting of a Free-Piston Linear Engine-Generator;Saiful,2008
4. Conceptual analysis of a four-stroke linear engine;Sorin Petreanu,2000
5. Starting of a Free-Piston Linear Engine-Generator by Mechanical Resonance and Rectangular Current Commutation;Saiful,2008