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JUCS - Journal of Universal Computer Science 18(11): 1454-1482
doi:
10.3217/jucs-018-11-1454
Received:
30 Nov 2011 | Approved:
15 May 2012 | Published:
01 Jun 2012
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Authors
Ricardo Queirós
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CRACS & INESC-Porto LA & DI-ESEIG/IPP, Porto, Portugal
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University of Porto, Porto, Portugal
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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.