TY  - JOUR
AU  - Joseph Zaks
TI  - On four-colourings of the rational four-space.
JO  - Aequationes mathematicae
PY  - 1989
SP  - 259
EP  - 266
VL  - 37
IS  - 2-3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1989__37_2-3_137304/
ID  - AM2_1989__37_2-3_137304
ER  -