@article{10_4064_cm_55_2_367_370,
     author = {Alejandro A. Sch\"affer and Ashok Subramanian},
     title = {A note on the chromatic number of the alternative negation of two graphs},
     journal = {Colloquium Mathematicum},
     pages = {367--370},
     publisher = {mathdoc},
     volume = {55},
     number = {2},
     year = {1987},
     doi = {10.4064/cm-55-2-367-370},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-55-2-367-370/}
}