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JUCS - Journal of Universal Computer Science 22(5): 608-629
doi:
10.3217/jucs-022-05-0608
Received:
14 Sep 2015 | Approved:
29 Apr 2016 | Published:
01 May 2016
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Authors
Yoon-Sung Kim 
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Korea University, Seoul, Republic of Korea
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Korea University, Seoul, Republic of Korea
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Korea University, Seoul, Republic of Korea
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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.