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Graphs and Combinatorics > 2016 > 32 > 3 > 1155-1166
Graphs and Combinatorics > 2013 > 29 > 3 > 527-533
Discrete Mathematics > 2012 > 312 > 24 > 3482-3488
Discrete Mathematics > 2007 > 307 > 6 > 683-693
Discrete Mathematics > 2006 > 306 > 1 > 11-18