@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}
}