M.  Tognon, Gabellieri, C., Pallottino, L., and Franchi, A., ?Aerial Co-Manipulation With Cables: The Role of Internal Force for Equilibria, Stability, and Passivity?, IEEE Robotics and Automation Letters, vol. 3, pp. 2577-2583, 2018. 

G.  Averta, Angelini, F., Bonilla, M., Bianchi, M., and Bicchi, A., ?Incrementality and Hierarchies in the Enrollment of Multiple Synergies for Grasp Planning?, IEEE Robotics and Automation Letters, vol. 3, pp. 2686-2693, 2018.