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JUCS - Journal of Universal Computer Science 3(8): 899-928
doi: 10.3217/jucs-003-08-0899
Published: 28 Aug 1997
This article is part of:
JUCS - Journal of Universal Computer Science 3(8)
Author
Simon Buckingham Shum - Corresponding author
The Open University, United Kingdom
Articles by this author in:  CrossRef  |  Google Scholar
Conflict of interest
The author has declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.
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