@article {aksen2012bilevel,
	title = {A bilevel fixed charge location model for facilities under imminent attack},
	journal = {Computers \& Operations Research},
	volume = {39},
	number = {7},
	year = {2012},
	pages = {1364{\textendash}1381},
	publisher = {Pergamon},
	author = {Aksen, Deniz and Necati Aras}
}
