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JUCS - Journal of Universal Computer Science 14(2): 299-313
doi:
10.3217/jucs-014-02-0299
Published:
28 Jan 2008
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Authors
João Marcelo Monte Da Silva 
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Universidade Federal de Pernambuco, Recife, Brazil
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Federal University of Pernambuco, Recife, Brazil
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Universidade do Minho, Braga, Portugal
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Universidad de Buenos Aires, Buenos Aires, Argentina
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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.