@article {7645,
	title = {Modeling congestion and service time in hub location problems},
	journal = {Applied Mathematical Modelling},
	volume = {55},
	year = {2018},
	pages = {13-32},
	url = {https://doi.org/10.1016/j.apm.2017.10.033},
	author = {Alumur, S.A. and Nickel, S. and Rohrbeck, B. and Saldanha-da-Gama, F.}
}
