Retractable Locking System Driven by Shape Memory Alloy Actuator for Lightweight Soft Robotic Application. - Young Jin Gong; Seong Taek Hwang; Sang Yul Yang; Kihyeon Kim; Jae Hyeong Park; Hosang Jung; Dongsu Shin; Hyouk Ryeol Choi (IEEE Robotics Autom. Lett., 2022)