@Article {DFJPS.jcs2011,
    author = {S. {De Capitani di Vimercati} and S. Foresti and S. Jajodia and S. Paraboschi and P. Samarati},
    title = {Authorization Enforcement in Distributed Query Evaluation},
    journal = {Journal of Computer Security (JCS)},
    volume = {19},
    number = {4},
    pages = {751-794},
    year = {2011}
}