conf/sigmod/97 Sushil Jajodia Pierangela Samarati V. S. Subrahmanian Elisa Bertino A Unified Framework for Enforcing Multiple Access Control Policies. 474-485 1997 SIGMOD Conference db/conf/sigmod/sigmod97.html#JajodiaSSB97 http://doi.acm.org/10.1145/253260.253364 db/conf/sigmod/JajodiaSSB97.html SIGMOD97/P474.PDF ... journals/tkde/BertinoBFS96 ... ... journals/tkde/BertinoSJ97 ... conf/dbsec/Bruggemann91 ... journals/tods/Fagin78 conf/iclp/GelfondL88 journals/tods/GriffithsW76 conf/dbsec/JonscherD95 conf/vldb/JonscherD94 conf/dbsec/Lunt88 ... journals/tods/RabittiBKW91 ... conf/pods/Gelder89 journals/csec/WooL93