Querying Multiple Features of Groups in Relational Databases - VLDB'96
Groupwise Processing of Relational Queries - VLDB'97
Optimization of Complex Aggregate Queries in Relational Databases (PhD Thesis)
Complex Aggregation at Multiple Granularities - EDBT'98
Ad Hoc OLAP : Expression and Evaluation - ICDE'99
Evaluation of Ad Hoc OLAP : In-Place Computation - SSDBM'99
The PanQ Tool and EMF SQL for Complex Data Management - SIGKDD'99
Joining Very Large Data Sets - Databases in Telecom workshop (VLDB'99 co-located) (to appear)
Extended SQL for Manipulating Clinical Warehouse Data - American Medical Informa tics Association (AMIA'99) (to appear)
Extending Complex Ad Hoc OLAP - CIKM'99 (to appear)
Decision Support Queries on a Tape-Resident Data Warehouse - IEEE Computer (to appear)