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JUCS - Journal of Universal Computer Science 18(12): 1741-1756
doi:
10.3217/jucs-018-12-1741
Received:
15 Sep 2011 | Approved:
15 Feb 2012 | Published:
28 Jun 2012
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Authors
Lin Ding
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Information Science and Technology Institute, Zhengzhou, China
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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.