%0 Journal Article %A Miscellane Miscellanea %T G. Mathews %J WiadomoĊ›ci Matematyczne %D 1985 %P 170 %V 26 %N 02 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/wm.v26i02.4061/ %R 10.14708/wm.v26i02.4061 %G pl %F 10_14708_wm_v26i02_4061