?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Schichao&rft.aulast=Zhang&rft.au=+Zhang+Schichao&rft.pages=155-177&rft.issn=0324-721X&rft.date=2003&rft.title=Acta+cybernetica&rft.issue=1&rft.volume=16&rft.atitle=Discovering+associations+in+very+large+databases+by+approximating&rft.genre=article