1. Barker, S.: The next 700 access control models or a unifying meta-model? In: Proceedings of 14th ACM Symposium on Access Control Models and Technologies, SACMAT, pp. 187–196 (2009)
2. Dell’Armi, T., Faber, W., Ielpa, G., Leone, N., Pfeifer, G.: Aggregate functions in disjunctive logic programming: Semantics, complexity, and implementation in DLV. In: Proceedings of the 18th International Joint Conference on Artificial Intelligence, IJCAI, pp. 847–852 (2003)
3. Lecture Notes in Computer Science;N. Leone,2008
4. Lecture Notes in Computer Science;N. Li,2002
5. Li, N., Mitchell, J.C., Winsborough, W.H.: Design of a role-based trust-management framework. In: Proceedings of 23rd IEEE Symposium on Security and Privacy, pp. 114–130 (2002)