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JUCS - Journal of Universal Computer Science 11(12): 2008-2033
doi:
10.3217/jucs-011-12-2008
Published:
28 Dec 2005
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Author
Michael Rathjen 
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Department of Mathematics, The Ohio State University, United States of America
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Conflict of interest
The author has declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.