1. Veerbeek, J.M., Kwakkel, G., van Wegen, E.E.H., et al., Early prediction of outcome of activities of daily living after stroke: a systematic review, Stroke, 2011, vol. 42, no. 5, p. 1482.
2. Liberson, W.T., Holmquest, H.J., Scot, D., and Dow, M., Functional electrotherapy: stimulation of the peroneal nerve synchronized with the swing phase of the gait of hemiplegic patients, Arch. Phys. Med. Rehabil., 1961, vol. 42, p. 101.
3. Liberson, W.T. and Offner, F.F., US Patent 3 344 792, 1967.
4. Moe, J.H. and Post, H.W., Functional electrical stimulation for ambulation in hemiplegia, Lancet, 1962, vol. 82, p. 285.
5. Crago, P.E., Lan, N., Veltink, P.H., et al., New control strategies for neuroprosthetic systems, J. Rehabil. Res. Dev., 1996, vol. 33, no. 2, p. 158.