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JUCS - Journal of Universal Computer Science 17(2): 164-182
doi:
10.3217/jucs-017-02-0164
Published:
28 Jan 2011
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Authors
Claudio Sapateiro 
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Polytechnic Institute of Setúbal, Setúbal, Portugal
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DCC, Universidad de Chile, Santiago, Chile
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University of Lisboa, Lisboa, Portugal
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University of Chile, Santiago de Chile, Chile
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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.