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Discussiones Mathematicae Graph Theory > 2003 > 23 > 2 > 261-272
Discussiones Mathematicae Graph Theory > 1995 > 15 > 2 > 205-216
Discussiones Mathematicae Graph Theory > 2003 > 23 > 2 > 261-272
Discussiones Mathematicae Graph Theory > 1995 > 15 > 2 > 205-216