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JUCS - Journal of Universal Computer Science 9(2): 106-119
doi:
10.3217/jucs-009-02-0106
Published:
28 Feb 2003
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Authors
Hans-Dieter Ehrich
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Technical University Braunschweig, Germany
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Technical University Braunschweig, Germany
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SIEMENS AG Transportation Systems, Germany
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Conflict of interest
The authors have declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.