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Discussiones Mathematicae Graph Theory > 2017 > 38 > 1 > 301-317
Discussiones Mathematicae Graph Theory > 2006 > 26 > 1 > 103-112
Discussiones Mathematicae Graph Theory > 2017 > 38 > 1 > 301-317
Discussiones Mathematicae Graph Theory > 2006 > 26 > 1 > 103-112