Spherical wrist dimensional synthesis adapted for tool-guidance medical robots T. Essomba, L. Nouaille, Med Amine Laribi, C.A. Nelson, S. Zeghloul and G. Poisson Mechanics & Industry, 15 3 (2014) 217-223 Published online: 30 May 2014 DOI: 10.1051/meca/2014022