Zhang, Z. ., H. . Yuan, J. . Song, and H. . Zhou. “Modelling of the Micro Lubricating Gap Geometry Between Valve Plate and Cylinder Block in an Axial Piston Pump”. International Journal of Fluid Power, vol. 21, no. 2, Nov. 2020, pp. 211-34, doi:10.13052/ijfp1439-9776.2123.