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JUCS - Journal of Universal Computer Science 15(7): 1508-1525
doi: 10.3217/jucs-015-07-1508
Published: 01 Apr 2009
This article is part of:
JUCS - Journal of Universal Computer Science 15(7)
Authors
Rosa Silva - Corresponding author
Escola Secundária Ferreira de Castro, Oliveira de Azeméis, Portugal
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António Andrade
Universidade Católica Portuguesa, Porto, Portugal
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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.
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