A.  Bicchi, Johansson, K. H., Palopoli, L., and Picasso, B., ?Quantised Control in Distributed Embedded Systems.?, in Proc. 16th Int. Symp. on Mathematical Theory of Networks and Systems, 2004. 

L.  Palopoli, Cucinotta, T., and Bicchi, A., ?Quality of service control in soft real-time applications?, in Proc. IEEE Int. Conf. on Decision and Control, 2003, pp. 664-669.