The URA97 Model for Role-Based User-Role Assignment. - Ravi S. Sandhu; Venkata Bhamidipati (DBSec, 1997)

The ARBAC97 model for role-based administration of roles: preliminary description and outline. - Ravi S. Sandhu; Venkata Bhamidipati; Edward J. Coyne; Srinivas Ganta; Charles E. Youman (ACM Workshop on Role-Based Access Control, 1997)

An Oracle Implementation of the PRA97 Model for Permission-Role Assignment. - Ravi S. Sandhu; Venkata Bhamidipati (ACM Workshop on Role-Based Access Control, 1998)

Role-based Administration of User-Role Assignment: The URA97 Model and its Oracle Implementation. - Ravi S. Sandhu; Venkata Bhamidipati (J. Comput. Secur., 1999)

The ARBAC97 Model for Role-Based Administration of Roles. - Ravi S. Sandhu; Venkata Bhamidipati; Qamar Munawer (ACM Trans. Inf. Syst. Secur., 1999)

An Attribute Based Framework for Risk-Adaptive Access Control Models. - Savith Kandala; Ravi S. Sandhu; Venkata Bhamidipati (ARES, 2011)