%0 Journal Article
%A Z. Kareńska
%T On some two functional equations in the theory of geometric objects
%J Commentationes Mathematicae
%D 1978
%P  365-375
%V 20
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.14708/cm.v20i2.5906/
%R 10.14708/cm.v20i2.5906
%G pl
%F 10_14708_cm_v20i2_5906