C.  Fang, A. Ajoudani, Bicchi, A., and Tsagarakis, N. G., ?Online Model Based Estimation of Complete Joint Stiffness of Human Arm?, IEEE Robotics and Automation Letters, vol. 3, no. 1, pp. 84 - 91, 2017 [Online]. Available: http://ieeexplore.ieee.org/document/7990237/

C.  Fang, A. Ajoudani, Bicchi, A., and Tsagarakis, N. G., ?Online Model Based Estimation of Complete Joint Stiffness of Human Arm?, in IEEE International Conference of Intelligent Robots and Systems (IROS2017), Vancouver, Canada, September 24?28, 2017, 2017.