| |
| 2001 | ||
|---|---|---|
| 1 | EE | Helle L. Christensen, Mads L. Haslund, Henrik N. Nielsen, Nectaria Tryfona: Operations for Conceptual Schema Manipulation: Definitions and Semantics. ADBIS 2001: 225-238 |
| 1 | Helle L. Christensen | [1] |
| 2 | Mads L. Haslund | [1] |
| 3 | Nectaria Tryfona | [1] |