@InProceedings {bs.soo94,
    author = {E. Bertino and P. Samarati},
    editor = {B. Thuraisingham and R. Sandhu and {T.Y.} Lin},
    booktitle = {Security for Object-Oriented Systems},
    title = {Research Issues in Discretionary Authorizations for Object Bases},
    publisher = {Springer Verlag London Ltd.},
    pages = {183-189},
    year = {1994}
}