title: flexible support for multiple access control policies. authors: v. s. subrahmanian , sushil jajodia , pierangela samarati , maria luisa sapino. venue: acm trans . database syst .. year: 2001
title: flexible support for multiple access control policies. authors: sushil jajodia , pierangela samarati , maria luisa sapino , v. s. subrahmanian. venue: acm transactions on database systems ( tods ). year: 2001