海量图书期刊资源，随时随地畅享阅读乐趣
[ACM Press the eleventh ACM symposium - Lake Tahoe, California, USA (2006.06.07-2006.06.09)] Proceedings of the eleventh ACM symposium on Access control models and technologies - SACMAT '06 - Delegation in the role graph modelWang, He; Osborn, Sylvia L. · 2006