Schepers, Ingo, David Schmitz, Daniel Weiler, Olaf Cochoy, and Uwe Neumann. 2011. “A NOVEL MODEL FOR OPTIMIZED DEVELOPMENT AND APPLICATION OF SWITCHING VALVES IN CLOSED LOOP CONTROL”. International Journal of Fluid Power 12 (3):31-40. https://journals.riverpublishers.com/index.php/IJFP/article/view/461.