@Article {bbfs.tkde96,
    author = {E. Bertino and C. Bettini and E. Ferrari and P. Samarati},
    title = {A Temporal Access Control Mechanism for Database Systems},
    journal = {IEEE Transactions on Knowledge and Data Engineering (TKDE)},
    volume = {8},
    number = {1},
    pages = {67-80},
    month = {February},
    year = {1996},
    note = {Special Issue on Secure Database Systems Technology}
}