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JUCS - Journal of Universal Computer Science 13(9): 1332-1343
doi:
10.3217/jucs-013-09-1332
Published:
28 Sep 2007
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Authors
Jili Tao
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Zhejiang University, 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.