?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Valmary&rft.aufirst=Aurore&rft.date=30+May+2023&rft.title=Les+contrats+de+dur%C3%A9e