6. Zehao Wu, Weijian Zhang, Xianli Wang, I-Ming Chen and Qingsong Xu*, A Lightweight Robotic Ultrasound System With Hybrid Force Control and Modular Force-Range Switching, IEEE Transactions on Robotics, 2026, Early Access, DOI: 10.1109/TRO.2026.3734315. (SCI, IF: 11.1)