title: supporting periodic authorizations and temporal reasoning in database access control. authors: e bertino , c bettini , e ferrari , p samarati. venue: vldb. year: 1996
title: supporting periodic authorizations and temporal reasoning in database access control. authors: e bertino , c bettini , e ferrari , p samarati. venue: proceedings of the international conference on very large & hellip ; ,. year: 1996.0