1. Cai, J.L., Yu, X.L., Yuan, G.J., Shen, Y.M., 2004. Influence of port timing on work process of air-powered engine. Journal of Zhejiang University (Engineering Science), 38(1):65–69 (in Chinese).
2. Chen, Y., Liu, H., Tao, G.L., 2005. Simulation on the port timing of an air-powered engine. International Journal of. Vehicle Design, 38(2/3):259–273. [doi:10.1504/IJVD.2005.007296]
3. Daw, N.A., Wang, J., Wu, Q.H., Chen, J., Zhao, Y., 2003. Parameter identification for nonlinear pneumatic cylinder actuators. Lecture Notes in Control and Information. Sciences, 281:77–88. [doi:10.1007/3-540-45802-6_7]
4. Higelin, P., Vasile, I., Charlet, A., Chamaillard, Y., 2004. Parametric optimization of a new hybrid pneumatic-combustion engine concept. International Journal of Engine Research, 5(2):205–217. [doi:10.1243/146808704773564596]
5. Jia, G.Z., Wang, X.Y., Wu, G.M., 2003. Development of the two-stage pneumatic extra-high pressure on-off valve. Machine Tool & Hydraulics, (3):12–13 (in Chinese).