An Administrative Model for Role Graphs. - He Wang 020; Sylvia L. Osborn (DBSec, 2003)

Delegation in the role graph model. - He Wang 020; Sylvia L. Osborn (SACMAT, 2006)

Discretionary access control with the administrative role graph model. - He Wang 020; Sylvia L. Osborn (SACMAT, 2007)

A Methodology for Bridging between RBAC and an Arbitrary Application Program. - Candy Wai-Yue Shum; Sylvia L. Osborn; He Wang 020 (Secure Data Management, 2008)

Static and Dynamic Delegation in the Role Graph Model. - He Wang 020; Sylvia L. Osborn (IEEE Trans. Knowl. Data Eng., 2011)

A Survey of Delegation from an RBAC Perspective. - Sylvia L. Osborn; He Wang 020 (J. Softw., 2013)