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JUCS - Journal of Universal Computer Science 9(7): 697-718
doi:
10.3217/jucs-009-07-0697
Published:
28 Jul 2003
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Author
Nenad Stojanovic 
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Institute AIFB, University of Karlsruhe, Karlsruhe, 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.