Huihua ZhaoJonathan HornJacob ReherVictor ParedesAaron D. AmesMulticontact Locomotion on Transfemoral Prostheses via Hybrid System Models and Optimization-Based Control.502-513201613IEEE Trans Autom. Sci. Eng.2https://doi.org/10.1109/TASE.2016.2524528db/journals/tase/tase13.html#ZhaoHRPA16