@article{DMGT_2008_28_1_a12,
     author = {Hammack, Richard},
     title = {A cancellation property for the direct product of graphs},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {179--184},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2008_28_1_a12/}
}