| 2003 | ||
|---|---|---|
| c4 | ||
| 1980 | ||
| j3 | ||
| 1978 | ||
| j2 | Börje Langefors: Comments on a paper by Biller and Neuhold: Semantics of data Bases: The semantics of data models. Inf. Syst. 3(1): 31-34 (1978) | |
| c3 | ||
| 1977 | ||
| j1 | ||
| 1974 | ||
| c2 | ||
| 1962 | ||
| c1 | ||
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