?url_ver=Z39.88-2004&rft_id=10.1103%2FPhysRevE.75.056115&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Kitsak%2C+Maksim&rft.aufirst=Maksim&rft.aulast=Kitsak&rft.issn=1539-3755&rft.volume=75&rft.issue=5&rft.pages=056115&rft.title=Physical+Review+E&rft.atitle=Betweenness+centrality+of+fractal+and+nonfractal+scale-free+model+networks+and+tests+on+real+networks&rft.date=May+2007&rft.genre=article