%0 Journal Article %A Riečan, Beloslav %T Lebesgue Density Theorem in Topological Spaces %J Mathematica slovaca %D 1967 %P 55-58 %V 17 %N 1 %U http://geodesic.mathdoc.fr/item/MASLO_1967_17_1_a5/ %G en %F MASLO_1967_17_1_a5