%0 Journal Article %A Pawlak, Ryszard Jerzy %T On functions with the set of discontinuity points belonging to some $sigma$-ideal %J Mathematica slovaca %D 1985 %P 327-341 %V 35 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1985__35_4_a2/ %G en %F MASLO_1985__35_4_a2