@article {10436,
	title = {A tabu-search based heuristic for the hub covering problem over incomplete hub networks},
	journal = {Computers \& Operations Research},
	volume = {36},
	year = {2009},
	pages = {3088-3096},
	url = {https://doi.org/10.1016/j.cor.2008.11.023},
	author = {Calik, H. and Alumur, S.A. and Kara, B.Y. and Karasan, O.E.}
}