?url_ver=Z39.88-2004&rft_id=10.1016%2FS0304-3975(99)00232-7&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=De+Nicola&rft.aufirst=Rocco&rft.au=De+Nicola%2C+Rocco&rft.issn=0304-3975&rft.date=2000&rft.title=Theoretical+Computer+Science&rft.atitle=Types+for+access+control&rft.issue=1&rft.pages=215-254&rft.volume=240&rft.genre=article