@article{YJOR_2009_19_1_a0,
     author = {Vangelis Th. Paschos},
     title = {An {Overview} on {Polynomial} {Approximation} of {NP-Hard} {Problems}},
     journal = {Yugoslav journal of operations research},
     pages = {3 },
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2009},
     zbl = {1274.90005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_2009_19_1_a0/}
}