I. Molloy, N. Li, T. Li, Z. Mao, Q. Wang, and J. Lobo. SACMAT '09: Proceedings of the 14th ACM symposium on Access control models and technologies, page 95--104. New York, NY, USA, ACM, (2009)
E. Mao, A. Salam, and K. Soliman. Communications of the Association for Information Systems, (2003)Available at: http: / / aisel. aisnet. org / cais / vol 11 / iss 1 / 16.
E. Mao, A. Salam, and K. Soliman. Communications of the Association for Information Systems, (2003)Available at: http: / / aisel. aisnet. org / cais / vol 11 / iss 1 / 16.