?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Lavialle&rft.aufirst=Christian&rft.date=2003&rft.title=La+gratuit%C3%A9%2C+une+notion+de+droit+%3F&rft.btitle=La+gratuit%C3%A9+et+le+domaine+public&rft.tpages=238&rft.genre=bookitem