Thies, S., Tresadern, P., Kenney, L., Smith, J., Howard, D., Goulermas, J., …Rigby, J. (2009). Movement variability in stroke patients and controls performing two upper limb functional tasks: a new assessment methodology. Journal of NeuroEngineering and Rehabilitation, 6(2), https://doi.org/10.1186/1743-0003-6-2