Dmitri V. Krioukov Kimberly C. Claffy Marina Fomenkov Fan R. K. Chung Alessandro Vespignani Walter Willinger The workshop on internet topology (wit) report. 69-73 2007 37 Computer Communication Review 1 http://doi.acm.org/10.1145/1198255.1198267 db/journals/ccr/ccr37.html#KrioukovCFCVW07