@conference {120,
	title = {On Notions and Sufficient Conditions for Forward Invariance of Sets for Hybrid Dynamical Systems},
	booktitle = {Proceedings of the 54th IEEE Conference on Decision and Control},
	series = {NULL},
	year = {2015},
	month = {December},
	pages = {2869-2874},
	author = {J. Chai and R. G. Sanfelice}
}
