Influence of knee flexion angle at initial contact and hip internal rotation on ‘stiff-knee’ gait: A dynamical 3D approachAlexandra Pimenta dos Santos, Faiz Ben Amar, Philippe Bidaud and Éric DesaillyMov Sport Sci/Sci Mot, 93 (2016) 71-76DOI: https://doi.org/10.1051/sm/2015042