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Discussiones Mathematicae Graph Theory > 2005 > 25 > 3 > 407-417
Discussiones Mathematicae Graph Theory > 1998 > 18 > 1 > 91-98
Discussiones Mathematicae Graph Theory > 2005 > 25 > 3 > 407-417
Discussiones Mathematicae Graph Theory > 1998 > 18 > 1 > 91-98