Thomas Erlebach Linda S. Moonen Frits C. R. Spieksma Danica Vukadinovic Connectivity Measures for Internet Topologies on the Level of Autonomous Systems. 1006-1025 2009 57 Operations Research 4 http://dx.doi.org/10.1287/opre.1080.0677 db/journals/ior/ior57.html#ErlebachMSV09