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S.  Casini, Tincani, V., Averta, G., Poggiani, M., C. Della Santina,, Battaglia, E., Catalano, M. G., Bianchi, M., Grioli, G., and Bicchi, A., ?Design of an under-actuated wrist based on adaptive synergies?, in Robotics and Automation (ICRA), 2017 IEEE International Conference on, 2017, pp. 6679?6686.