1. Hirai, K.: Current and future perspective of Honda humanoid robot. In: Proc. of 1997 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 1997), pp. 500–508 (1997)
2. Yamaguchi, J., Inoue, S., Nishino, D., Takanishi, A.: Development of a bipedal humanoid robot having antagonistic driven joints and three dof trunk. In: Proc. of the 1998 IEEE/RSJ Int. Conf. on Intelligent Robots and Systems, pp. 96–101 (1998)
3. Nagasaka, K., Inaba, M., Inoue, H.: Walking pattern generation for a humanoid robot based on optimal gradient method. In: Proc. of 1999 IEEE Int. Conf. on Systems, Man, and Cybernetics (1999)
4. Setiawan, S.A., Hyon, S.H., Yamaguchi, J., Takanishi, A.: Physical interaction between human and a bipedal humanoid robot – realization of human-follow walking. In: Proceddings of the 1999 IEEE International Conference on Robotics and Automation, pp. 361–367 (1999)
5. Nishiwaki, K., Sugihara, T., Kagami, S., Inaba, M., Inoue, H.: Realtime generation of humanoid walking trajectory by mixture and connection of pre-designed motions – online control by footprint specification. In: Proc. of International Conference on Robotics and Automation (ICRA 2001), pp. 4110–4115 (2001)