TY  - JOUR
AU  - Guldan, Filip
TI  - On a problem of colouring the real plane
JO  - Mathematica Bohemica
PY  - 1991
SP  - 309
EP  - 318
VL  - 116
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/MB.1991.126170/
DO  - 10.21136/MB.1991.126170
LA  - en
ID  - 10_21136_MB_1991_126170
ER  -