Koskinen, Kari T., and Matti J. Vilenius. “STEADY STATE AND DYNAMIC CHARACTERISTICS OF WATER HYDRAULIC PROPORTIONAL CERAMIC SPOOL VALVE”. International Journal of Fluid Power 1, no. 1 (March 1, 2000): 5–15. Accessed July 16, 2024. https://journals.riverpublishers.com/index.php/IJFP/article/view/653.