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Discussiones Mathematicae Graph Theory > 2012 > 32 > 3 > 473-485
Open Mathematics > 2010 > 8 > 3 > 459-467
Discussiones Mathematicae Graph Theory > 1998 > 18 > 1 > 63-72
Discussiones Mathematicae Graph Theory > 2012 > 32 > 3 > 473-485
Open Mathematics > 2010 > 8 > 3 > 459-467
Discussiones Mathematicae Graph Theory > 1998 > 18 > 1 > 63-72