%0 Journal Article %A Guldan, Filip %T On a problem of colouring the real plane %J Mathematica Bohemica %D 1991 %P 309-318 %V 116 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.1991.126170/ %R 10.21136/MB.1991.126170 %G en %F 10_21136_MB_1991_126170