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Discussiones Mathematicae Graph Theory > 2009 > 29 > 3 > 499-510
Discussiones Mathematicae Graph Theory > 2004 > 24 > 1 > 125-135
Discussiones Mathematicae Graph Theory > 2009 > 29 > 3 > 499-510
Discussiones Mathematicae Graph Theory > 2004 > 24 > 1 > 125-135