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JUCS - Journal of Universal Computer Science 2(6): 492-502
doi:
10.3217/jucs-002-06-0492
Published:
28 Jun 1996
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Authors
Firoz Kaderali 
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Institute of Communication Systems, FernUniversität in Hagen, Germany
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Centre for the Development of Distance Education - ZFE, FernUniversität in Hagen, FernUniversitaet in Hagen, Germany
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Institute of Communication Systems, FernUniversität in Hagen, Germany
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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.