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Discussiones Mathematicae Graph Theory > 2014 > 34 > 4 > 723-733
Discussiones Mathematicae Graph Theory > 2013 > 33 > 4 > 759-770
Discussiones Mathematicae Graph Theory > 2014 > 34 > 4 > 723-733
Discussiones Mathematicae Graph Theory > 2013 > 33 > 4 > 759-770