@InProceedings {bjs.oo94,
    author = {E. Bertino and S. Jajodia and P. Samarati},
    editor = {B. Thuraisingham and R. Sandhu and {T.Y.} Lin},
    booktitle = {Security for Object-Oriented Systems},
    title = {Enforcing Mandatory Access Controls in Object Bases},
    publisher = {Springer Verlag London Ltd.},
    pages = {96-116},
    year = {1994}
}