%0 Journal Article %A Z. Кareńska %T On some functional equation in the theory of geometric objects %J Commentationes Mathematicae %D 1969 %P 219-226 %V 12 %N 2 %U http://geodesic.mathdoc.fr/articles/10.14708/cm.v12i2.5141/ %R 10.14708/cm.v12i2.5141 %G pl %F 10_14708_cm_v12i2_5141