%0 Journal Article %A Mrówka, S. %T Characterization of classes of functions by Lebesgue sets %J Czechoslovak Mathematical Journal %D 1969 %P 738-744 %V 19 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100933/ %R 10.21136/CMJ.1969.100933 %G en %F 10_21136_CMJ_1969_100933