@InProceedings {ddfs-icwe2004,
    author = {E. Damiani and S. {De Capitani di Vimercati} and C. Fugazza and P. Samarati},
    booktitle = {Proc. of the International Conference on Web Engineering},
    title = {Extending Policy Languages to the Semantic Web},
    address = {Munich, Germany},
    month = {July},
    day = {28-30},
    year = {2004}
}