S.  Huh, Tonietti, G., and Bicchi, A., ?Neural network based robust adaptive control for a variable stiffness actuator?, in Control and Automation, 16 th Mediterranean Conference on Control and Automation, 2008, pp. 1028 - 1034. 

A.  Bicchi, Bavaro, M., Boccadamo, G., Carli, D. D., Filippini, R., Grioli, G., Piccigallo, M., Rosi, A., Schiavi, R., Sen, S., and Tonietti, G., ?Physical Human-Robot Interaction: Dependability, Safety, and Performance?, in Proc. 10th Intl. Workshop Advanced Motion Control, 2008, pp. 9-14. 

A.  Bicchi, Greco, G., Guiggiani, M., and Tonietti, G., ?Hybrid Modelling of an Electronically Controlled Limited Slip Differential?, presented at the 8-10 September, 2005.