@article{DMGT_1996_16_2_a5,
     author = {Szelecka, Alina and W{\l}och, Andrzej},
     title = {A note on strong and co-strong perfectness of the {X-join} of graphs},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {151--155},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_1996_16_2_a5/}
}