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JUCS - Journal of Universal Computer Science 8(1): 97-116
doi:
10.3217/jucs-008-01-0097
Published:
28 Jan 2002
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Author
Klaus Schmaranz 
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Institute for Information Processing and Computer Supported New Media (IICM), Graz, Austria
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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.