1. Computer Security Technology Planning Study;Anderson,1972
2. Information Technology Security Evaluation Criteria (ITSEC): Provisional Harmonized Criteria;Commission of the European Communities,1991
3. Computer Security Model: Unified Exposition and Multics Interpretation;Bell,1975
4. Integrity Considerations for Secure Computer Systems;Biba,1977
5. Lattice-based access control models;Sandhu;IEEE Computer,1993