@article{GDZPPN002037645, title = {On four-colourings of the rational four-space.}, journal = {Aequationes mathematicae}, volume = {38}, year = {1989}, pages = {259-266}, zbl = {0705.05033}, url = {http://dml.mathdoc.fr/item/GDZPPN002037645} }
Zaks, Joseph. On four-colourings of the rational four-space.. Aequationes mathematicae, Tome 38 (1989) pp. 259-266. http://gdmltest.u-ga.fr/item/GDZPPN002037645/