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First publ. in: Proceedings of the 10th International Symposium on Graph Drawing (GD´02) (LNCS 2528), 2002, pp. 1-11
Konstanzer Online-Publikations-System (KOPS) URN: http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-73474
URL: http://kops.ub.uni-konstanz.de/volltexte/2009/7347/
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