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JUCS - Journal of Universal Computer Science 1(2): 131-135
doi:
10.3217/jucs-001-02-0131
Published:
28 Feb 1995
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Authors
Juha Honkala 
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Department of Mathematics University of Turku and Turku Centre for Computer Science (TUCS), Turku, Finland
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Institut fuer Algebra und Diskrete Mathematik, Technische Universität Wien, Vienna, Austria
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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.