@Article {sbj.tkde96,
    author = {P. Samarati and E. Bertino and S. Jajodia},
    title = {An Authorization Model for Distributed Hypertext Systems},
    journal = {IEEE Transactions on Knowledge and Data Engineering (TKDE)},
    volume = {8},
    number = {4},
    pages = {555-562},
    month = {August},
    year = {1996},
    note = {Special Issue on Digital Libraries}
}