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JUCS - Journal of Universal Computer Science 21(2): 206-222
doi: 10.3217/jucs-021-02-0206
Received: 18 Jul 2014 | Approved: 22 Jan 2015 | Published: 01 Feb 2015
This article is part of:
JUCS - Journal of Universal Computer Science 21(2)
Authors
Henry Hermans - Corresponding author
Open University of the Netherlands, Heerlen, Netherlands
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José Janssen
Open University of the Netherlands, Heerlen, Netherlands
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Hubert Vogten
Open University of the Netherlands, Heerlen, Netherlands
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Rob Koper
Open University of the Netherlands, Heerlen, Netherlands
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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.
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