@article {10432,
	title = {Multimodal hub location and hub network design},
	journal = {OMEGA},
	volume = {40},
	year = {2012},
	pages = {927-939},
	url = {https://doi.org/10.1016/j.omega.2012.02.005},
	author = {Alumur, S.A. and Kara, B.Y. and Karasan O.E.}
}