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1990 | ||
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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] |