A multilevel security model for a distributed object-oriented system. - Vijay Varadharajan; Stewart Black (ACSAC, 1990)

An Analysis of the Proxy Problem in Distributed Systems. - Vijay Varadharajan; Phillip Allen; Stewart Black (S&P, 1991)

Multilevel security in a distributed object-oriented system. - Vijay Varadharajan; Stewart Black (Comput. Secur., 1991)