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JUCS - Journal of Universal Computer Science 9(9): 1008-1029
doi:
10.3217/jucs-009-09-1008
Published:
28 Sep 2003
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Authors
Vincent Dugat
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IRIT-UPS, Toulouse, France
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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.