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JUCS - Journal of Universal Computer Science 14(1): 59-87
doi:
10.3217/jucs-014-01-0059
Published:
01 Jan 2008
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Author
Stephan Lukosch
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FernUniversität in Hagen, Hagen, Germany
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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.