Discussiones Mathematicae Graph Theory
Discussiones Mathematicae Graph Theory > 2009 > 29 > 2 > 385-400
Discussiones Mathematicae Graph Theory > 2012 > 32 > 3 > 545-556
Discussiones Mathematicae Graph Theory > 2012 > 32 > 4 > 737-747
Discussiones Mathematicae Graph Theory > 2016 > 36 > 1 > 141-151