1. Abadi, M., Burrows, M., Lampson, B., Plotkin, G.: A calculus for access control in distributed systems. ACM Transactions on Programming Languages and Systems (TOPLAS) 15(4), 706–734 (1993)
2. Ahsant, M.: On-demand Restricted Delegation: A Framework for Dynamic, Context-Aware, Least-Privilege Delegation in Grids. PhD thesis, Kungliga Tekniska Högskolan (2009)
3. Bardram, J., Thomas, K., Nielsen, C.: Mobility in health care - reporting on our initial observations and pilot study. Technical Report CfPC 2003-PB-52, Center for Pervasive Computing (2003)
4. Barka, E., Sandhu, R.: A role-based delegation model and some extensions. In: Proceedings of 16th Annual Computer Security Application Conference, New Orleans, U.S.A. (December 2000)
5. Barka, E.S.: Framework for Role-Based Delegation Models. PhD thesis, George Mason University (2002)