Moving onto High Steps for a Four-limbed Robot with Torso Contact. - Takashi Matsuzawa; Hiroshi Naito; Takehiro Sato; Kota Terae; Masatsugu Murakami; Shunya Yoshida; Atsuo Takanishi; Kenji Hashimoto; Takanobu Matsubara; Keisuke Namura; Xiao Sun 005; Akihiro Imai; et al. (IROS, 2019)