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M.  Nardelli, Valenza, G., Bianchi, M., Greco, A., Lanata, A., Bicchi, A., and Scilingo, E. P., ?Gender-specific velocity recognition of caress-like stimuli through nonlinear analysis of Heart Rate Variability?, in Engineering in Medicine and Biology Society (EMBC), 2015 37th Annual International Conference of the IEEE, Milano, ITA, 2015, pp. 298?301. 

E. P.  Scilingo and Bicchi, A., ?Tactile Flow: Does it exist, is it useful and how??, in Proc. Int. Worksh. on Electroactive Polymers and Biosystems, Lucca, Italy, 2001, p. 142. 

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G.  Ambrosi, Bicchi, A., De Rossi, D., and Scilingo, E. P., ?The Role of Contact Area Spread Rate in Haptic Discrimination of Softness?, in Proc. IEEE Int. Conf. on Robotics and Automation, 1999, pp. 305-310. 

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E. P.  Scilingo, De Rossi, D., Bicchi, A., and Iaccone, P., ?Haptic display for replication of rheological behaviour of surgical tissues: modelling, control, and experiments?, in Proc. Annual ASME Symp. on Haptic Interfaces for Virtual Environments and Teleoperator Systems, Dallas, 1997.