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JUCS - Journal of Universal Computer Science 9(10): 1220-1243
doi:
10.3217/jucs-009-10-1220
Published:
28 Oct 2003
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Author
Ousmane Koné 
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Universite Paul Sabatier IRIT 118 route de Narbonne, Toulouse, France
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Conflict of interest
The author has declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.