1. Boyd, J.E., Little, J.J.: Advanced Studies in Biometrics: Summer School on Biometrics, Alghero, Italy, June 2–6, 2003, Revised Selected Lectures and Papers (Lecture Notes on Computer Science), vol. 3161/2005, chap. Biometric Gait Recognition, pp. 19–42. Springer (2005)
2. Cutting, J.E., Kozlowski, L.T.: Recognizing friends by their walk: gait perception without familiarity cues. Bull. Psychonomic Soc. 9(5), 353–356 (1977)
3. McGeer, T.: Passive dynamic walking. Int. J. Robot. Res. 9(2), 62–82 (1990)
4. McGeer, T.: Passive walking with knees. In: IEEE International Conference on Robotics and Automation, pp. 1640–1645 (1990)
5. Kuo, A.D.: A simple model of bipedal walking predicts the preferred speed-step length relationship. J. Biomech. Eng. 123, 264–269 (2001)