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Discussiones Mathematicae Graph Theory > 1995 > 15 > 2 > 147-166
Discussiones Mathematicae Graph Theory > 1995 > 15 > 1 > 59-72
Discussiones Mathematicae Graph Theory > 1995 > 15 > 2 > 147-166
Discussiones Mathematicae Graph Theory > 1995 > 15 > 1 > 59-72