@article{DMGT_2013_33_4_a1,
     author = {Liang, Hongyu},
     title = {Some {Sharp} {Bounds} on the {Negative} {Decision} {Number} of {Graphs}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {649--656},
     publisher = {mathdoc},
     volume = {33},
     number = {4},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2013_33_4_a1/}
}