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Discussiones Mathematicae Graph Theory > 2015 > 35 > 1 > 157-169
Discussiones Mathematicae Graph Theory > 2009 > 29 > 1 > 143-162
Discussiones Mathematicae Graph Theory > 2015 > 35 > 1 > 157-169
Discussiones Mathematicae Graph Theory > 2009 > 29 > 1 > 143-162