1. Banala, S.K., Kim, S.H., Agrawal, S.K., Scholz, J.P.: Robot assisted gait training with active leg exoskeleton (ALEX). IEEE Trans. Neural Syst. Rehabil. Eng. 17(1), 653–658 (2009)
2. Beletsky, V.V.: Dvunogaya hod’ba. Model’nye zadachi dinamiki i upravlenia. M., Nauka (1984)—In Russian
3. Beyl, P.: Design and control of a knee exoskeleton powered by pleated pneumatic artificial muscles for robot-assisted gait rehabilitation. In: Mechanical Engineering, P. D. dissertation, Ed. Brussels University (2010)
4. Colombo, G., Joerg, M., Schreier, R., Dietz, V.: Treadmill training of paraplegic patients using a robotic orthosis. J. Rehabil. Res. Dev. 37, 693–700 (2000)
5. van der Kooij, H., Veneman, J., Ekkelenkamp, R.: Design of a compliantly actuated exoskeleton for an impedance controlled gait trainer robot. In: Conference Proceedings IEEE Engineering in Medicine and Biology Society, New York, NY, pp. 189–93 (2006)