“Forming of Size of Counterbalancing Overfall of Pressure in Hydraulic Drive Sensible to the Change of Loading, on the Basis of Multi-Mode Directional Control Valve”. Visnyk of Vinnytsia Politechnical Institute, no. 2, Nov. 2010, pp. 179-84, https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/1225.