%0 Journal Article %A Redaktor %T Zadania %J WiadomoĊ›ci Matematyczne %D 1980 %P 93-95 %V 23 %N 01 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/wm.v23i01.3775/ %R 10.14708/wm.v23i01.3775 %G pl %F 10_14708_wm_v23i01_3775