G. M. Cruz-Martínez, A. H. Vilchis-González, L. A. Zúñiga-Avilés, J. C. Ávila-Vilchis, and A. I. Hernández-Sánchez, “Design of an Exoskeleton based on Four Cases of Upper Limb Rehabilitation Study”, Rev Mex Ing Biomed, vol. 39, no. 1, pp. 81–94, Jan. 2018.