Feedback control of a pneumatically driven soft finger using a photoelastic polyurethane bending sensor. - Yoshiki Mori; Mizuki Fukuhara; Mingzhu Zhu; Yuho Kinbara; Akira Wada; Masahiko Mitsuzuka; Yoshiro Tajitsu; Sadao Kawamura (Adv. Robotics, 2021)