1. Data Base Security and Integrity;Fernandez,1981
2. Guideline for Security of Computer Applications;NBS;FIPS 73,1980
3. Guideline for Planning and Management of Database Applications;NBS;FIPS 77,1980
4. Protection Mechanism Models: Their Usefulness;Jones,1978
5. Protection in Operating Systems;Harrison;Commun. ACM,1976