@Misc {ls.mdbms2011,
    author = {G. Livraga and P. Samarati},
    editor = {{H.C.A.} {van Tilborg} and S. Jajodia},
    booktitle = {Encyclopedia on Cryptography and Security},
    title = {Multilevel Database},
    publisher = {Springer},
    year = {2011}
}