@article{YJOR_1991_1_1_a3,
     author = {Miroslav D. A\v{s}i\'c and Vera V. Kova\v{c}evi\'c-Vuj\v{c}i\'c},
     title = {NP-Hard {Problems} and {Test} {Problems}  {For} {Global} {Concave} {Minimization} {Methods}},
     journal = {Yugoslav journal of operations research},
     pages = {45 },
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_1991_1_1_a3/}
}