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JUCS - Journal of Universal Computer Science 18(16): 2334-2360
doi:
10.3217/jucs-018-16-2334
Received:
02 Sep 2011 | Approved:
27 Aug 2012 | Published:
28 Aug 2012
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Authors
Javier Melero 
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Universitat Pompeu Fabra, Barcelona, Spain
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Universitat Pompeu Fabra, Barcelona, Spain
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Universitat Pompeu Fabra, Barcelona, 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.