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JUCS - Journal of Universal Computer Science 21(13): 1746-1766
doi:
10.3217/jucs-021-13-1746
Received:
04 May 2015 | Approved:
06 Jul 2015 | Published:
28 Dec 2015
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Authors
Nadia Bouassida 
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Sfax University, Sfax, Tunisia
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King Abdulaziz University, Jeddah, Saudi Arabia
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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.