@article{
        author={Gregori, Enrico and Improta, Alessandro and Lenzini, Luciano and Rossi, Lorenzo and Sani, Luca},
        title={Discovering the geographic properties of the Internet AS-level topology},
        pages={34-42},
	year={2013},
	issn={2076-0310},
	journal={Networking Science},
	volume={3},
	number={1-4},
	doi={10.1007/s13119-013-0024-4},
	url={http://dx.doi.org/10.1007/s13119-013-0024-4},
	publisher={Tsinghua University Press},
	keywords={Internet topology; geography; autonomous system; BGP}
}