1. The UCONABC usage control model;Park;ACM Transactions on Information and System Security (TISSEC),2004
2. A policy language for distributed usage control;Hilty,2007
3. Dealing with privacy obligations: important aspects and technical approaches;Mont,2004
4. An obligation model bridging access control policies and privacy policies;Ni,2008
5. Availability enforcement by obligations and aspects identification;Cuppens,2006