@Article {saj.dke96,
author = {P. Samarati and P. Ammann and S. Jajodia},
title = {Maintaining Replicated Authorizations in Distributed Database Systems},
journal = {Data & Knowledge Engineering (DKE)},
volume = {18},
number = {1},
pages = {55-84},
month = {February},
year = {1996}
}