1. The evolution of load-sensing hydraulics;Henke;Diesel Progress International Edition,1998
2. Electrohydraulic load sensing;Backe;SAE Trans,1991
3. Energy saving on hydraulic systems of excavators;Uehara,1982
4. Investigation of active materials as driving elements of a hydraulic hybrid actuator;Ellison,2005
5. Design and testing of a bidirectional magnetostrictive — hydraulic hybrid actuator;Ellison,2004