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Theoretical Computer Science > 2010 > 411 > 31-33 > 2978-2986
Journal of Combinatorial Optimization > 2009 > 18 > 1 > 38-50
Theoretical Computer Science > 2010 > 411 > 31-33 > 2978-2986
Journal of Combinatorial Optimization > 2009 > 18 > 1 > 38-50