@InProceedings {dfjl.dbsec2012,
    author = {S. {De Capitani di Vimercati} and S. Foresti and S. Jajodia and G. Livraga},
    booktitle = {Proc. of the 26th Annual IFIP WG 11.3 Working Conference on Data and Applications Security and Privacy (DBSec 2012)},
    title = {Enforcing Subscription-based Authorization Policies in Cloud Scenarios},
    address = {Paris, France},
    month = {July},
    day = {11-13},
    year = {2012}
}