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Discrete Applied Mathematics > 2012 > 160 > 7-8 > 1143-1151
Graphs and Combinatorics > 2009 > 25 > 4 > 513-520
Discrete Mathematics > 2008 > 308 > 15 > 3187-3198
Discussiones Mathematicae Graph Theory > 2004 > 24 > 3 > 423-430