@InProceedings {ddfs-icwe2006,
    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 = {Modality Conflicts in Semantics-Aware Access Control},
    address = {Menlo Park, California, USA},
    month = {July},
    day = {12-14},
    year = {2006}
}