?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.respol.2015.01.011&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Catini%2C+Roberto&rft.aufirst=Roberto&rft.aulast=Catini&rft.atitle=Identifying+geographic+clusters%3A+A+network+analytic+approach&rft.title=Research+Policy&rft.date=November+2015&rft.volume=44&rft.issue=9&rft.pages=1749-1762&rft.issn=0048-7333&rft.genre=article