?url_ver=Z39.88-2004&rft_id=10.1103%2FPhysRevE.81.036117&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.issue=3&rft.pages=036117&rft.volume=81&rft.date=March+2010&rft.title=Physical+Review+E&rft.atitle=Scale-free+models+for+the+structure+of+business+firm+networks&rft.genre=article