?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Van+Helmont%2C+M&rft.aulast=Van+Helmont&rft.aufirst=M&rft.date=1969&rft.atitle=De+penitentiaire+behandeling+van+de+recidivisten+en+de+abnormale+delinquenten&rft.title=Bulletin+Strafinrichtingen&rft.pages=107-118&rft.genre=article