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JUCS - Journal of Universal Computer Science 7(7): 550-565
doi:
10.3217/jucs-007-07-0550
Published:
28 Jul 2001
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Authors
David L. Hicks 
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Aalborg University Esbjerg, Esbjerg, Denmark
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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.