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| * | 2006 | |
|---|---|---|
| 2 | EE | F. A. Grootjen, Theo P. van der Weide: Conceptual query expansion. Data Knowl. Eng. 56(2): 174-193 (2006) |
| 2004 | ||
| 1 | EE | F. A. Grootjen, Theo P. van der Weide: Effectiveness of Index Expressions. NLDB 2004: 171-181 |
| 1 | Theo P. van der Weide | [1] [2] |