New Body Design for Flexible Mono-Tread Mobile Track: Layered Structure and Passive Retro-Flexion. - Takafumi Haji; Tetsuya Kinugasa; Shinichi Araki; Daiki Hanada; Koji Yoshida; Hisanori Amano; Ryota Hayashi; Kenichi Tokuda; Masatsugu Iribe (J. Robotics Mechatronics, 2014)