@article{YJOR_2017_27_2_a1,
     author = {M. Dhingra and C.S. Lalitha},
     title = {Set {Optimization} {Using} {Improvement} {Sets}},
     journal = {Yugoslav journal of operations research},
     pages = {153 },
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_2017_27_2_a1/}
}