?url_ver=Z39.88-2004&rft_id=10.1088%2F1751-8113%2F41%2F22%2F224016&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Andrea&rft.aulast=Capocci&rft.au=Capocci%2C+Andrea&rft.title=Journal+of+Physics+A%3A+Mathematical+and+Theoretical&rft.atitle=Folksonomies+and+clustering+in+the+collaborative+system+CiteULike&rft.date=June+2008&rft.volume=41&rft.issue=22&rft.pages=224016&rft.issn=1751-8113&rft.genre=article