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Discussiones Mathematicae Graph Theory > 2017 > 37 > 1 > 239-249
Discussiones Mathematicae Graph Theory > 2006 > 26 > 2 > 231-248
Discussiones Mathematicae Graph Theory > 2017 > 37 > 1 > 239-249
Discussiones Mathematicae Graph Theory > 2006 > 26 > 2 > 231-248