1. Akers, A., Lin, S.J.: A Dynamic model of the flapper-nozzle component of an electrohydraulic servovalve. ASME Trans. J. Dyn. Sys. Meas. Control 3, 105–109 (1989)
2. Akers, A., Lin, S.J.: Dynamic analysis of flapper-nozzle valve. ASME Trans. J. Dyn. Sys. Meas. Control 113, 163–167 (1991)
3. Anderson, T.O.: Fluid power systems—modeling and analysis. Institute of Energy Technology, Aalborg University, 2nd ed. (2003)
4. Anderson, R.T., Lipy, : Mathematical modeling of a two spool flow control servovalve using a pressure control pilot. ASME Trans. J. Dyn. Sys. Meas. Control 124, 420–427 (2002)
5. Andres, L.A., Vance, J.M.: Effect of fluid inertia on finite-length squeeze film dampers. ASLE Trans. 30(30), 384–393 (1986)