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A model of authorization for next-generation database systems

Fausto Rabitti, Elisa Bertino, Won Kim, Darrell Woelk
1991 ACM Transactions on Database Systems  
Rabitti, "Tree Signatures for XML Querying and Navigation", First International XML Database Symposium, XSym 2003.  ...  Zezula, "A Signature-Based Approach for Efficient Relationship Search on XML Data Collections", XSym 2004 -Second International XML Database Symposium, August 29-30, In Conjunction with VLDB 2004 Toronto  ... 
doi:10.1145/103140.103144 fatcat:jenqawgxufburorbu7zxufm35m