%0 Journal Article %A Witold Więsław %T Publications of the Society of Sciences in Paris %J Antiquitates Mathematicae %D 2013 %P 215 %V 7 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/am.v7i0.742/ %R 10.14708/am.v7i0.742 %G pl %F 10_14708_am_v7i0_742