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JUCS - Journal of Universal Computer Science 19(11): 1661-1683
doi:
10.3217/jucs-019-11-1661
Received:
15 Dec 2012 | Approved:
28 May 2013 | Published:
01 Jun 2013
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Authors
Francisco J. García-Peñalvo
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University of Salamanca, Salamanca, Spain
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University of Salamanca, Salamanca, Spain
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University of Salamanca, Salamanca, Spain
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University of Salamanca, Salamanca, Spain
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UPC Universitat Politècnica de Catalunya Barcelona-Tech, Barcelona, Spain
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UPC - BarcelonaTech, Barcelona, Spain
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Open Universiteit Netherlands, Heerlen, Netherlands
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Open University of the Netherlands, Heerlen, Netherlands
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Institute of Educational Cybernetics, Bolton, United Kingdom
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Dom Szkolen i Doradztwa Mykowska Aleksandra, Krakow, Poland
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Instituto Superior de Engenharia do Porto, Porto, Portugal
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University of Belgrade, Belgrade, Serbia
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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.