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JUCS - Journal of Universal Computer Science 16(12): 1650-1665
doi:
10.3217/jucs-016-12-1650
Published:
28 Jun 2010
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Author
Yang Cai
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Carnegie Mellon University, Pittsburgh, United States of America
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Conflict of interest
The author has declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.