?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ravat&rft.aufirst=Franck&rft.volume=1&rft.date=1995&rft.atitle=Class+Partitioning&rft.title=Computing+and+Information&rft.pages=759-779&rft.genre=article