| 1979 | ||
|---|---|---|
| c2 | H. Gerstmann, Alexander Ollongren: Abstract Objects as Abstract Data Types. Abstract Software Specifications 1979: 439-450 | |
| 1974 | ||
| c1 | H. Gerstmann, Hans Diel, W. Witzel: The Reliability of Programming Systems. Programming Methodology 1974: 87-113 | |
| 1 | Hans Diel | |
| 2 | Alexander Ollongren | |
| 3 | W. Witzel |
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