@article {185,
	title = {Forward Invariance of Sets for Hybrid Dynamical Systems ({Part I})},
	journal = {IEEE Transactions on Automatic Control},
	volume = {64},
	number = {6},
	year = {2019},
	month = {June},
	pages = {2426-2441},
	author = {J. Chai and R. G. Sanfelice}
}
