?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.spl.2008.04.013+&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Durante&rft.aufirst=Fabrizio&rft.au=Durante%2C+Fabrizio&rft.issue=17&rft.pages=2902+-+2909&rft.volume=78&rft.date=2008&rft.title=Statistics+%26+Probability+Letters&rft.atitle=Threshold+copulas+and+positive+dependence&rft.genre=article