@InProceedings {cs.safecomp92,
    author = {S. Castano and P. Samarati},
    booktitle = {Proc. of the Int. Conf. on Safety, Security, and Reliability of Computers (Safecomp '92)},
    title = {Modeling Users' Behavior and Threats in Security Systems},
    address = {Zurich},
    pages = {273-278},
    month = {September},
    year = {1992}
}