%0 Journal Article %A . . %T Zadania %J WiadomoĊ›ci Matematyczne %D 1976 %P 115-117 %V 20 %N 01 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/wm.v20i01.3439/ %R 10.14708/wm.v20i01.3439 %G pl %F 10_14708_wm_v20i01_3439