@article {21,
	title = {Input-to-state stability of impulsive and switching hybrid systems with time-delay},
	journal = {Automatica },
	volume = {47},
	year = {2011},
	pages = {899{\textendash}908},
	doi = {10.1016/j.automatica.2011.01.061},
	author = {Jun Liu and Xinzhi Liu and Wei-Chau Xie}
}
