1. Querying semi-structured data;Abiteboul,1997
2. Query caching and optimization in distributed mediator systems;Adali,1996
3. Complexity of answering queries using materialized views;Abiteboul,1998
4. Answering queries using materialized views with disjunction;Afrati,1999
5. The Lorel query language for semistructured data;Abiteboul;Int. J. Digital Libraries,1997