Hu, J., Z. Yang, Z. Huang, Y. Jin, B. Yu, and X. Kong. “Flow Measurement for the Pre-Stage of Jet Pipe Servo Valve Using 2D -PIV Technique”. International Journal of Fluid Power, vol. 19, no. 3, Nov. 2018, pp. 165-72, doi:10.1080/14399776.2018.1514931.