Wang, T., Cai, M., Kawashima, K. and Kagawa, T. (2005) “MODELLING OF A NOZZLE-FLAPPER TYPE PNEUMATIC SERVO VALVE INCLUDING THE INFLUENCE OF FLOW FORCE”, International Journal of Fluid Power, 6(3), pp. 33–43. Available at: https://journals.riverpublishers.com/index.php/IJFP/article/view/566 (Accessed: 4 May 2024).