1. M. Raibert, K. Blankespoor, G. Nelson, and R. Playter, “BigDog, the rough-terrain quadruped robot,” Proc. of the 17th World Congress, pp. 10822–10825, 2008.
2. R. Playter, M. Buehler, and M. Raibert, “BigDog,” Proc. of SPIE, vol. 6230, 2006.
3. F. Asano and Z. W. Luo, “The effect of semicircular feet on energy dissipation by heel-strike in dynamic biped locomotion,” Proc. of IEEE Int. Conf. on Robotics and Automation, pp. 3976–3981, 2007.
4. J. S. Yeon, O. Kwon, and J. H. Park, “Trajectory generation and dynamic control of planar biped robots with curved soles,” Journal of Mechanical Science and Technology, vol. 20, no. 5, pp. 602–611, 2006.
5. L. R. Palmer III and D. E. Orin, “3D control of a high-speed quadruped trot,” Industrial Robot: An International Journal, vol. 33, no. 4, pp. 298–302, 2006.