@conference {92,
	title = {Sufficient Conditions for Passivity and Stability of Interconnections of Hybrid Systems using Sums of Storage Functions},
	booktitle = {Proceedings of the 2014 American Control Conference},
	series = {NULL},
	year = {2014},
	pages = {1432-1437},
	keywords = {hybrid systems},
	author = {R. Naldi and R. G. Sanfelice}
}
