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A generalization of Konig-Egervary graphs and heuristics for the maximum independent set problem with improved approximation ratios
Paschos, Vangelis Th., (1997)
Combinatorial approximation of maximum k-VERTEX cover in bipartite graphs within ration 0.7
Paschos, Vangelis Th., (2018)
When polynomial approximation meets exact computation
Paschos, Vangelis Th., (2015)