5Vijayalakshmi Atlurl ,Wei-Kuang Huang.An Authorization Model for Workflows[C].In :Proc of the Fifth European Symposium on Research in Computer Security, 1996.
6Vijayalakshmi Atlufi ,Wei-Kuang Huang.A Petri Net Based Safety Analysis of Workflow Authorization Models[J].Journal of Computer Security, 1999.
7Bertino E,Bonatti PA,Ferrari E.TRBAC:A temporal role-based access control model[J].ACM Transactions on Information and System Security,2001 ;4(3) : 191-223.
8Ravi S Sandhu.Separation of Duties in Computerized Information Systems[C].In:Sushil Jajodia,Carl Landwehr eds.Database Security, IV:Status and Prospects,North Holland,1991:179-189.
9Nabil R Adam, Vijayalakshmi Atluri, Wei-Kuang Huang.Modeling and Analysis of Workflows Using Petri Nets[J].Journal of Intelligent Information Systems, 1998; 10(2) : 1-29.
10David F Ferraiolo,Ravi Sandhu,Serban Gavrila et al.Proposed NIST Standard for Role-Based Access Control[J].ACM Transactions on Information and Systems Security,2001 ;4(3):224-274.
