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JUCS - Journal of Universal Computer Science 22(8): 1148-1174
doi:
10.3217/jucs-022-08-1148
Received:
31 May 2016 | Approved:
15 Oct 2016 | Published:
01 Aug 2016
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Authors
Gonzalo Rojas 
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University of Concepción, Concepción, Chile
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University of Concepción, Concepción, Chile
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University of Concepción, Concepción, Chile
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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.