Role-based access control: a multi-dimensional view. - Ravi S. Sandhu; Edward J. Coyne; Hal L. Feinstein; Charles E. Youman (ACSAC, 1994)

Role-Based Access Control Models. - Ravi S. Sandhu; Edward J. Coyne; Hal L. Feinstein; Charles E. Youman (Computer, 1996)