1. Becker, M.Y.: Cassandra: Flexible Trust Management and its Application to Electronic Health Records. PhD thesis, University of Cambridge (October 2005)
2. Becker, M.Y., Sewell, P.: Cassandra: Flexible trust management, applied to electronic health records. In: Proc. 17th IEEE Computer Security Foundations Workshop (CSFW), pp. 139–154. IEEE Computer Society Press, Los Alamitos (2004)
3. Lecture Notes in Computer Science;M. Blaze,1999
4. Bonatti, P.A., Samarati, P.: A uniform framework for regulating service access and information release on the web. Journal of Computer Security 10(3), 241–272 (2002)
5. Chaudhuri, S., Dutta, T., Sudarshan, S.: Fine grained authorization through predicated grants. In: Proc. 23rd IEEE International Conference on Data Engineering (ICDE 2007), pp. 1174–1183 (April 2007)