@article {lu2014facility,
	title = {Facility location with economies and diseconomies of scale: models and column generation heuristics},
	journal = {IIE Transactions},
	volume = {46},
	number = {6},
	year = {2014},
	pages = {585{\textendash}600},
	publisher = {Taylor \& Francis},
	author = {Lu, Da and Gzara, Fatma and Elhedhli, Samir}
}
