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Steve H Collins; Martijn Wisse; Andy Ruina; Russ Tedrake (2005). "Efficient bipedal robots based on passive-dynamic Walkers". Science. 307 (5712): 1082–1085. Bibcode:2005Sci...307.1082C. doi:10.1126/science.1107799. PMID15718465. S2CID1315227. and Steve H Collins; Andy Ruina (2005). "A bipedal walking robot with efficient and human-like gait". Proc. IEEE International Conference on Robotics and Automation.
Steve H Collins; Martijn Wisse; Andy Ruina; Russ Tedrake (2005). "Efficient bipedal robots based on passive-dynamic Walkers". Science. 307 (5712): 1082–1085. Bibcode:2005Sci...307.1082C. doi:10.1126/science.1107799. PMID15718465. S2CID1315227. and Steve H Collins; Andy Ruina (2005). "A bipedal walking robot with efficient and human-like gait". Proc. IEEE International Conference on Robotics and Automation.
Mariano, Garcia; et al. (1998). "The simplest walking model: stability, complexity, and scaling". Journal of Biomechanical Engineering. 120 (2): 281–288. doi:10.1115/1.2798313. PMID10412391.
Goswami, Ambarish; Thuilot, Benoit; Espiau, Bernard (1998). "A Study of the Passive Gait of a Compass-Like Biped Robot: Symmetry and Chaos". The International Journal of Robotics Research. 17 (12): 1282–1301. CiteSeerX10.1.1.17.4861. doi:10.1177/027836499801701202. S2CID1283494.
Steve H Collins; Martijn Wisse; Andy Ruina (2001). "A 3-D Passive Dynamic Walking Robot with Two Legs and Knees". International Journal of Robotics Research. 20 (7): 607–615. doi:10.1177/02783640122067561. S2CID12350943.
Steve H Collins; Martijn Wisse; Andy Ruina; Russ Tedrake (2005). "Efficient bipedal robots based on passive-dynamic Walkers". Science. 307 (5712): 1082–1085. Bibcode:2005Sci...307.1082C. doi:10.1126/science.1107799. PMID15718465. S2CID1315227. and Steve H Collins; Andy Ruina (2005). "A bipedal walking robot with efficient and human-like gait". Proc. IEEE International Conference on Robotics and Automation.
Goswami, Ambarish; Thuilot, Benoit; Espiau, Bernard (1998). "A Study of the Passive Gait of a Compass-Like Biped Robot: Symmetry and Chaos". The International Journal of Robotics Research. 17 (12): 1282–1301. CiteSeerX10.1.1.17.4861. doi:10.1177/027836499801701202. S2CID1283494.