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JUCS - Journal of Universal Computer Science 21(4): 503-525
doi:
10.3217/jucs-021-04-0503
Received:
06 Oct 2014 | Approved:
27 Mar 2015 | Published:
01 Apr 2015
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Authors
Robert Bucki 
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Institute of Management and Information Technology in Bielsko-Biał, Bielsko-Biała, Poland
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Tomas Bata University in Zlín, Zlín, Czech Republic
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Silesian University in Opava, Karviná, 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.