Shape-Adaptive Universal Soft Parallel Gripper for Delicate Grasping Using a Stiffness-Variable Composite Structure. - Jae-Young Lee 003; Yong-Sin Seo; Chanhun Park; Je-Sung Koh; Uikyum Kim; Jongwoo Park 002; Hugo Rodrigue; Byeungin Kim; Sung-Hyuk Song (IEEE Trans. Ind. Electron., 2021)