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This document contains a history of this page, from the current version to the earliest one available.
| Version | Name | User | Date | Time | |
| current | Matthias Berth | decodon.com | 28 March 2007 | 4:49 pm | |
| Matthias Berth | paul.math-inf.uni-greifswald.de. | 3 December 1999 | 7:37 am | ||
| Matthias Berth | paul.math-inf.uni-greifswald.de. | 3 December 1999 | 7:37 am | ||
| Matthias Berth | paul.math-inf.uni-greifswald.de. | 3 December 1999 | 7:37 am | ||
| Matthias Berth | 141.53.249.221 | 14 September 1999 | 7:11 am | ||