?url_ver=Z39.88-2004&rft_id=10.1038%2Fnphys2580&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Caldarelli&rft.au=Caldarelli%2C+Guido&rft.aufirst=Guido&rft.volume=9&rft.title=Nature+Physics&rft.pages=125-126&rft.issue=3&rft.issn=1745-2473&rft.atitle=Reconstructing+a+credit+network&rft.date=March+2013&rft.genre=article