| |
| 1980 | ||
|---|---|---|
| 1 | A. Bergstra, H. J. M. Goeman, Alexander Ollongren, G. A. Terpstra, Theo P. van der Weide: Axioms for multilevel objects. Fundam. Inform. 3(2): 171-180 (1980) | |
| 1 | H. J. M. Goeman | [1] |
| 2 | Alexander Ollongren | [1] |
| 3 | G. A. Terpstra | [1] |
| 4 | Theo P. van der Weide | [1] |