Zhang, Xu. “Transient Flow Characteristics of a Pressure Differential Valve With Different Valve Spool Damping Orifice Structures”. Strojniški vestnik - Journal of Mechanical Engineering 70, no. 3-4 (March 28, 2024): 141–158. Accessed July 3, 2024. http://193.2.78.197/index.php/sv-jme/article/view/691.