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Graphs and Combinatorics > 2016 > 32 > 1 > 311-321
Algebra and Logic > 2010 > 49 > 2 > 120-129
Journal of Combinatorial Optimization > 2001 > 5 > 1 > 81-94
Graphs and Combinatorics > 2016 > 32 > 1 > 311-321
Algebra and Logic > 2010 > 49 > 2 > 120-129
Journal of Combinatorial Optimization > 2001 > 5 > 1 > 81-94