| |
| 1996 | ||
|---|---|---|
| 1 | EE | L. J. Campbell, Terry A. Halpin, Henderik Alex Proper: Conceptual Schemas with Abstractions: Making Flat Conceptual Schemas More Comprehensible. Data Knowl. Eng. 20(1): 39-85 (1996) |
| 1 | Terry A. Halpin | [1] |
| 2 | Henderik Alex Proper (Erik Proper) | [1] |