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