1. Maskrey, R.H., Thayer, W.J.: A brief history of electrohydraulic servomechanisms. Moog Tech. Bull. 100, 141 (1978)
2. Soon, C.C., Ghazali, R., Jaafar, H.I., Hussien, S.Y.S., Rozali, S.M., Rashid, M.Z.A.: Position tracking optimization for an electro-hydraulic actuator system. J. Telecommun. Electron. Comput. Eng. 8(7), 1–6 (2016)
3. Soon, C.C., Ghazali, R., Jaafar, H.I., Hussien, S.Y.S., Sam, Y.M., Rahmat, M.F.: Controller parameter optimization for an electro-hydraulic actuator system based on particle swarm optimization. J. Teknol. 78(6–13), 101–108 (2016)
4. Merritt, H.E.: Hydraulic Control Systems. Wiley, New York (1967)
5. Bonchis, A., Corke, P.I., Rye, D.C.: Experimental evaluation of position control methods for hydraulic systems. IEEE Trans. Control Syst. Technol. 10(6), 876–882 (2002)