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Discussiones Mathematicae Graph Theory > 2011 > 31 > 2 > 293-312
Discussiones Mathematicae Graph Theory > 2011 > 31 > 1 > 63-78
Discussiones Mathematicae Graph Theory > 2011 > 31 > 2 > 293-312
Discussiones Mathematicae Graph Theory > 2011 > 31 > 1 > 63-78