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Discussiones Mathematicae Graph Theory > 2007 > 27 > 1 > 19-27
Discussiones Mathematicae Graph Theory > 2007 > 27 > 1 > 143-157
Discussiones Mathematicae Graph Theory > 2007 > 27 > 1 > 19-27
Discussiones Mathematicae Graph Theory > 2007 > 27 > 1 > 143-157