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JUCS - Journal of Universal Computer Science 14(16): 2630-2649
doi:
10.3217/jucs-014-16-2630
Published:
28 Aug 2008
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Author
José Cañas
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University of Granada, Granada, Spain
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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.