| |
| 1990 | ||
|---|---|---|
| 2 | Joachim Biskup, Uwe Räsch, Holger Stiefeling: An Extension of SQL for Querying Graph Relations. Comput. Lang. 15(1): 65-82 (1990) | |
| 1987 | ||
| 1 | EE | Joachim Biskup, Uwe Räsch: The Equivalence Problem For Relational Database Schemes. MFDBS 1987: 42-70 |
| 1 | Joachim Biskup | [1] [2] |
| 2 | Holger Stiefeling | [2] |