?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Prinsen&rft.aufirst=E.&rft.au=Prinsen%2C+E.&rft.degree=Doctoral&rft.date=2007&rft.title=Te+oud+voor+de+wipkip