Silvana Castano Giancarlo Martella Pierangela Samarati Analysis, Comparison and Design of Role-Based Security Specifications. 31-55 1996 21 Data Knowl. Eng. 1 db/journals/dke/dke21.html#CastanoMS96 http://dx.doi.org/10.1016/S0169-023X(96)00025-0