Wu, D., R. Burton, G. Schoenau, and D. Bitner. “ESTABLISHING OPERATING POINTS FOR A LINEARIZED MODEL OF A LOAD SENSING SYSTEM”. International Journal of Fluid Power, vol. 3, no. 2, Aug. 2002, pp. 47-54, https://journals.riverpublishers.com/index.php/IJFP/article/view/625.