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JUCS - Journal of Universal Computer Science 20(13): 1813-1828
doi:
10.3217/jucs-020-13-1813
Received:
20 Jan 2014 | Approved:
06 Sep 2014 | Published:
28 Nov 2014
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Authors
Juan-Miguel López-Gil 
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Universidad del País Vasco (UPV/EHU), Vitoria, Spain
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Universitat de Lleida, Lleida, Spain
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Universidad del Cauca, Popayan, Colombia
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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.