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JUCS - Journal of Universal Computer Science 10(7): 910-925
doi:
10.3217/jucs-010-07-0910
Published:
28 Jul 2004
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Authors
Ana Lúcia De Moura 
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Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
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Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
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PUC-Rio, Rio de Janeiro, Brazil
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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.