@conference {3157, title = {Online Model Based Estimation of Complete Joint Stiffness of Human Arm}, booktitle = {IEEE International Conference of Intelligent Robots and Systems (IROS2017)}, year = {2017}, address = {Vancouver, Canada, September 24{\textendash}28, 2017}, keywords = {Robotics}, author = {C. Fang and A. Ajoudani and A. Bicchi and N. G. Tsagarakis} }