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Observations on the Role Life-Cycle in the Context of Enterprise Security Management. Kern A,Kuhlmann M,Schaad A. Proceedings of the7th ACM Symposium on Access Control Models and Technologies(SAC-MAT 2002 ) . 2002
[2]
Usage Control A Vision for Next Geneation Access Control. Sandhu R,Park J. MMM-ACNS . 2003