Jezernik, S., Schrer, R., Colombo, G., andMorari, M. (2003): 'Adaptive robotic rehabilitation of locomotion: a clinical study in spinally injured individuals',Spinal Cord,41, pp. 657 666Krebs, H. I., Hogan, N., Aisen, M. L., andVolpe, B. T. (199
: 'Robot aided neurorehabilitation',IEEE Trans. Rehab. Eng.,6, pp. 75 87Kwakkel, G., Wagenaar, R. C., Koelman, T. W., Lankhorst, G. J., andKoetsier, J. C. (1997): 'Effects of intensity of rehabilitation after stroke. A research synthesis',Stroke,28, pp. 1550 1556