?url_ver=Z39.88-2004&rft_id=10.1209%2Fepl%2Fi2004-10070-4&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Fabio&rft.aulast=Pammolli&rft.au=Pammolli%2C+Fabio&rft.atitle=Statistical+properties+of+business+firms+structure+and+growth&rft.title=EPL+(Europhysics+Letters)&rft.date=2004&rft.volume=67&rft.issue=3&rft.pages=498&rft.issn=0295-5075&rft.genre=article