Hirohisa Hirukawa, Shizuko Hattori, Shuuji Kajita, Kensuke Harada, Kenji Kaneko, Fumio Kanehiro, Mitsuharu Morisawa, Shinichiro Nakaoka. A Pattern Generator of Humanoid Robots Walking on a Rough Terrain. In 2007 IEEE International Conference on Robotics and Automation, ICRA 2007, 10-14 April 2007, Roma, Italy. pages 2181-2187, IEEE, 2007. [doi]