title: an access control model supporting periodicity constraints and temporal reasoning. authors: elena ferrari , pierangela samarati , claudio bettini , elisa bertino. venue: acm trans . database syst .. year: 1998.0
title: an access control model supporting periodicity constraints and temporal reasoning elisa bertino , claudio bettini , elena ferrari , pierangela samarati. authors: nan. venue: acm transactions on database systems ( tods ). year: 1998.0