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JUCS - Journal of Universal Computer Science 18(7): 901-916
doi:
10.3217/jucs-018-07-0901
Received:
08 Aug 2011 | Approved:
27 Mar 2012 | Published:
01 Apr 2012
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Authors
Freddy Bolanos 
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Universidad Nacional de Colombia, Medellin, Colombia
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Universidad de Antioquia, Medellin, Colombia
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University of California, Irvine, Irvine, United States of America
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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.