Bill Cheswick Hal Burch Steve Branigan Mapping and Visualizing the Internet. 1-12 2000 conf/usenix/2000g USENIX Annual Technical Conference, General Track http://www.usenix.org/publications/library/proceedings/usenix2000/general/cheswick.html db/conf/usenix/usenix2000g.html#CheswickBB00