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JUCS - Journal of Universal Computer Science 18(18): 2576-2598
doi:
10.3217/jucs-018-18-2576
Received:
02 Jun 2012 | Approved:
28 Sep 2012 | Published:
01 Oct 2012
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Authors
Pilar Sancho
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Complutense University of Madrid, Madrid, Spain
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Complutense University of Madrid, Madrid, Spain
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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.