S. Kajita, O. Matsumoto, and M. Saigo, Real-time 3d walking pattern generation for a biped robot with telescopic legs, IEEE Int. Conf. on Robotics and Automation (ICRA'01), pp.2299-2306, 2001.

S. Kajita, F. Kanehiro, K. Kaneko, K. Fujiwara, K. Harada et al., Biped walking pattern generation by using preview control of zero-moment point, IEEE Int. Conf. on Robotics and Automation (ICRA'03), vol.2, pp.1620-1626, 2003.

M. Morisawa, K. Harada, S. Kajita, K. Kaneko, F. Kanehiro et al., A biped pattern generation allowing immediate modification of foot placement in real-time, IEEE/RAS Int. Conf. on Humanoid Robots (Humanoids'06), pp.581-586, 2006.

T. Takenaka, T. Matsumoto, and T. Yoshiike, Real time motion generation and control for biped robot -1st report: Walking gait pattern generation, IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (IROS'09), pp.1084-1091, 2009.

K. Harada, S. Kajita, K. Kaneko, and H. Hirukawa, An analytical method on real-time gait planning for a humanoid robot, IEEE/RAS Int. Conf. on Humanoid Robots (Humanoids'04), pp.640-655, 2004.

K. Nishiwaki, S. Kagami, Y. Kuniyoshi, M. Inaba, and H. Inoue, Online generation of humanoid walking motion based on a fast generation method of motion pattern that follows desired zmp, IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (IROS'02), pp.2684-2689, 2002.

A. Herdt, N. Perrin, and P. Wieber, Walking without thinking about it, IEEE Int. Conf. on Intelligent Robots and Systems (IROS'10), pp.190-195, 2010.
URL : https://hal.archives-ouvertes.fr/inria-00567668

J. M. Donelan, R. Kram, and A. D. Kuo, Mechanical work for stepto-step transitions is a major determinant of the metabolic cost of human walking, Journal of Experimental Biology, vol.205, issue.23, pp.3717-3727, 2002.

K. E. Gordon, D. P. Ferris, and A. D. Kuo, Metabolic and mechanical energy costs of reducing vertical center of mass movement during gait, Archives of Physical Medicine and Rehabilitation, vol.90, issue.1, pp.136-144, 2009.

J. D. Ortega and C. T. Farley, Minimizing center of mass vertical movement increases metabolic cost in walking, Journal of Applied Physiology, vol.99, issue.6, pp.2099-2107, 2005.

P. G. Adamczyk, S. H. Collins, and A. D. Kuo, The advantages of a rolling foot in human walking, Journal of Experimental Biology, vol.209, issue.20, pp.3953-3963, 2006.

A. Kuo, The six determinants of gait and the inverted pendulum analogy: A dynamic walking perspective, Human Movement Science, vol.26, issue.4, pp.617-656, 2007.

M. Franken, G. Van-oort, and S. Stramigioli, Analysis and simulation of fully ankle actuated planar bipedal robots, IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (IROS'08), pp.634-639, 2008.

M. Srinivasan and A. Ruina, Computer optimization of a minimal biped model discovers walking and running, Nature, vol.439, issue.7072, pp.72-75, 2006.

D. Tlalolini, C. Chevallereau, and Y. Aoustin, Comparison of different gaits with rotation of the feet for a planar biped, Robotics and Autonomous Systems, vol.57, issue.4, pp.371-383, 2009.
URL : https://hal.archives-ouvertes.fr/hal-00794718

A. D. Kuo, J. M. Donelan, and A. Ruina, Energetic consequences of walking like an inverted pendulum: Step-to-step transitions, Exercise and Sport Sciences Reviews, vol.33, issue.2, 2005.

P. G. Adamczyk and A. D. Kuo, Redirection of center-of-mass velocity during the step-to-step transition of human walking, Journal of Experimental Biology, vol.212, issue.16, pp.2668-2678, 2009.

A. D. Kuo, Energetics of actively powered locomotion using the simplest walking model, Journal of Biomechanical Engineering, vol.124, issue.1, pp.113-120, 2002.

. Buschmann, Simulation and Control of Biped Walking Robots, 2010.

K. Terada and Y. Kuniyoshi, Online gait planning with dynamical 3d-symmetrization method, IEEE/RAS Int. Conf. on Humanoid Robots (Humanoids'07), pp.222-227, 2007.

R. Tajima, D. Honda, and K. Suga, Fast running experiments involving a humanoid robot, IEEE Int. Conf. on Robotics and Automation (ICRA'09), pp.1571-1576, 2009.

R. Sellaouti, O. Stasse, S. Kajita, K. Yokoi, and A. Kheddar, Faster and smoother walking of humanoid HRP-2 with passive toe joints, IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (IROS'06), pp.4909-4914, 2006.

S. Kajita, S. Kajita, K. Kaneko, M. Morisawa, S. Nakaoka et al., ZMP-based biped running enhanced by toe springs, IEEE Int. Conf. on Robotics and Automation (ICRA'07), pp.3963-3969, 2007.

K. Nishiwaki, S. Kagami, Y. Kuniyoshi, M. Inaba, and H. Inoue, Toe joints that enhance bipedal and fullbody motion of humanoid robots, IEEE Int. Conf. on Robotics and Automation (ICRA'02), pp.3105-3110, 2002.

K. Miura, M. Morisawa, F. Kanehiro, S. Kajita, K. Kaneko et al., Human-like walking with toe supporting for humanoids, IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (IROS'11), pp.4428-4435, 2011.

M. Morisawa, S. Kajita, K. Kaneko, K. Harada, F. Kanehiro et al., Pattern generation of biped walking constrained on parametric surface, IEEE Int. Conf. on Robotics and Automation (ICRA'05), pp.2405-2410, 2005.