S.  Wolf, Grioli, G., Eiberger, O., Friedl, W., Grebenstein, M., Hoppner, H., Burdet, E., Caldwell, D. G., Carloni, R., Catalano, M. G., Lefeber, D., Stramigioli, S., Tsagarakis, N. G., Damme, V. M., Ham, V. R., Vanderborght, B., Visser, L. C., Bicchi, A., and Albu-Schaeffer, A., ?Variable Stiffness Actuators: Review on Design and Components?,  IEEE/ASME Transactions on Mechatronics , vol. 21, no. 5, pp. 2418 - 2430, 2016 [Online]. Available: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7330025

G.  Grioli, Wolf, S., Garabini, M., Catalano, M. G., Burdet, E., Caldwell, D. G., Carloni, R., Friedl, W., Grebenstein, M., Laffranchi, M., Lefeber, D., Stramigioli, S., Tsagarakis, N. G., Damme, V. M., Vanderborght, B., Albu-Schaeffer, A., and Bicchi, A., ?Variable Stiffness Actuators: the user?s point of view?, Int. J. Robotics Research, vol. 34, no. 6, pp. 727-743, 2015 [Online]. Available: http://ijr.sagepub.com/cgi/reprint/0278364914566515v1.pdf?ijkey=anmgudvoLz7ZloP&keytype=finite

G. M.  Gasparri, Garabini, M., Pallottino, L., Malagia, L., Catalano, M. G., Grioli, G., and Bicchi, A., ?Variable Stiffness Control for Oscillation Damping?, in IEEE International Conference of Intelligent Robots and Systems (IROS2015), Hamburg, Germany, September 28 - October 02, 2015, 2015, pp. 6543 - 6550 [Online]. Available: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7354312

B.  Vanderborght, Albu-Schaeffer, A., Bicchi, A., Burdet, E., Caldwell, D. G., Carloni, R., Catalano, M. G., Eiberger, O., Friedl, W., Ganesh, G., Garabini, M., Grebenstein, M., Grioli, G., Haddadin, S., Hoppner, H., Jafari, A., Laffranchi, M., Lefeber, D., Petit, F., Stramigioli, S., Tsagarakis, N. G., Damme, V. M., Ham, V. R., Visser, L. C., and Wolf, S., ?Variable Impedance Actuators: a Review?, Robotics and Autonomous Systems, vol. 61, no. 12, pp. 1601?1614, 2013 [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0921889013001188

M. G.  Catalano, Grioli, G., Garabini, M., Belo, F. A. W., Di Basco, A., Tsagarakis, N. G., and Bicchi, A., ?A Variable Damping module for Variable Impedance Actuation?, in International Conference of Robotics and Automation - ICRA 2012, Saint Paul, MN, USA, 2012, pp. 2666 - 2672. 

B.  Vanderborght, Albu-Schaeffer, A., Bicchi, A., Burdet, E., Caldwell, D. G., Carloni, R., Catalano, M. G., Ganesh, G., Garabini, M., Grioli, G., Haddadin, S., Jafari, A., Laffranchi, M., Lefeber, D., Petit, F., Stramigioli, S., Tsagarakis, N. G., Damme, V. M., Ham, V. R., Visser, L. C., and Wolf, S., ?Variable Impedance Actuators: Moving the Robots of Tomorrow?, International Conference of Intelligent Robots and Systems - IROS 2012- Best Jubilee Video Award. 2012. 

V.  Tincani, Catalano, M. G., Farnioli, E., Garabini, M., Grioli, G., Fantoni, G., and Bicchi, A., ? Velvet fingers: A dexterous gripper with active surfaces?, in International Conference of Intelligent Robots and Systems - IROS 2012, Vilamoura, Algarve, Portugal, 2012, pp. 1257 - 1263 . 

G.  Grioli, Catalano, M. G., Garabini, M., Bonomo, F., Serio, A., Salaris, P., Belo, F. A. W., Mancini, M., Bicchi, A., and Passaglia, A., ?Variable stiffness actuators: muscles for the next generation of robots?, in Automatica.it 2011, Pisa, Italy, 2011. 

M. G.  Catalano, Grioli, G., Garabini, M., Bonomo, F., Mancini, M., Tsagarakis, N. G., and Bicchi, A., ?VSA - CubeBot. A modular variable stiffness platform for multi degrees of freedom systems?, in 2011 IEEE International Conference on Robotics and Automation, Shangai, China, 2011, pp. 5090 - 5095. 

M.  Bianchi, Grioli, G., Scilingo, E. P., Santello, M., and Bicchi, A., ?Validation of a Virtual Reality Environment to Study Anticipatory Modulation of Digit Forces and Position?, in Eurohaptics 2010, Amsterdam (The Netherlands), 2010, vol. 6192/2010, pp. 136 - 143. 

M. G.  Catalano, Grioli, G., Bonomo, F., Schiavi, R., and Bicchi, A., ?VSA-HD: From the Enumeration Analysis to the Prototypical Implementation?, in IEEE/RSJ International Conference on Intelligent RObots and Systems, St. Louis MO USA, 2010, pp. 3676 - 3681. 

R.  Schiavi, Grioli, G., Sen, S., and Bicchi, A., ?VSA-II: A Novel Prototype of Variable Stiffness Actuator for Safe and Performing Robots Interacting with Humans?, in Proc. IEEE Int. Conf. on Robotics and Automation, 2008, pp. 2171 - 2176.