@Article {cdf.jcs97,
    author = {S. Castano and S. {De Capitani di Vimercati} and {M.G.} Fugini},
    title = {Automated Derivation of Global Authorizations for Database Federations},
    journal = {Journal of Computer Security (JCS)},
    volume = {5},
    number = {4},
    pages = {271-301},
    year = {1997}
}