Development of an unit type robot "KOHGA2" with stuck avoidance ability. - Hitoshi Miyanaka; Norihiko Wada; Tetsushi Kamegawa; Noritaka Sato; Shingo Tsukui; Hiroki Igarashi; Fumitoshi Matsuno (ICRA, 2007)

Development of "Souryu-IV" and "Souryu-V: " Serially connected crawler vehicles for in-rubble searching operations. - Masayuki Arai; Yoshinori Tanaka; Shigeo Hirose; Hiroyuki Kuwahara; Shingo Tsukui (J. Field Robotics, 2008)