%0 Journal Article %A Keleti, Tamás %T A covering property of some classes of sets in $\mathbb R^2$ %J Acta Universitatis Carolinae. Mathematica et Physica %D 1998 %P 111-118 %V 39 %N 1-2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_1998__39_1-2_a7/ %G en %F AUCMP_1998__39_1-2_a7