C. Della Santina, Piazza, C., Santaera, G., Grioli, G., Catalano, M. G., and Bicchi, A., ?Estimating Contact Forces from Postural Measures in a class of Under-Actuated Robotic Hands?, in IEEE International Conference of Intelligent Robots and Systems (IROS2017), Vancouver, Canada, September 24?28, 2017, 2017.