7) C. Ott, M.A. Roa and G. Hirzinger: “Posture and balance control for biped robots based on contact force optimization,” Proc. of the IEEE-RAS Int. Conf. on Humanoid Robots, pp.26-33, 2011.
8) S. Feng, E. Whitman, X. Xinjilefu and C.G. Atkeson: “Optimization based full body control for the atlas robot,” Proc. of the IEEE-RAS Int. Conf. on Humanoid Robots, pp.120-127, 2015.