@InCollection {SD.fosad01,
    author = {P. Samarati and S. {De Capitani di Vimercati}},
    editor = {R. Focardi and R. Gorrieri},
    booktitle = {Foundations of Security Analysis and Design},
    title = {Access Control: Policies, Models, and Mechanisms},
    publisher = {Springer-Verlag},
    volume = {2171},
    series = {LNCS},
    year = {2001}
}