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Discussiones Mathematicae Graph Theory > 2012 > 32 > 4 > 677-683
Graphs and Combinatorics > 2012 > 28 > 1 > 97-107
Discussiones Mathematicae Graph Theory > 2012 > 32 > 4 > 677-683
Graphs and Combinatorics > 2012 > 28 > 1 > 97-107