@InCollection {dfjs.acploedmds2007,
    author = {S. {De Capitani di Vimercati} and S. Foresti and S. Jajodia and P. Samarati},
    editor = {T. Yu and S. Jajodia},
    booktitle = {Secure Data Management in Decentralized Systems},
    title = {Access Control Policies and Languages in Open Environments},
    publisher = {Springer-Verlag},
    year = {2007}
}