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JUCS - Journal of Universal Computer Science 21(9): 1210-1233
doi:
10.3217/jucs-021-09-1210
Received:
23 Sep 2014 | Approved:
18 Aug 2015 | Published:
01 Sep 2015
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Authors
Libor Polčák 
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Brno University of Technology, Brno, Czech Republic
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Brno University of Technology, Brno, Czech Republic
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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.