@article{DMGT_2006_26_1_a6,
     author = {Kostochka, Alexandr and West, Douglas},
     title = {Chv\'atal's {Condition} cannot hold for both a graph and its complement},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {73--76},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2006_26_1_a6/}
}