%0 Journal Article
%A Z. Cybertowic
%T On some approximation problems
%J Commentationes Mathematicae
%D 1968
%P  61-74
%V 12
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.14708/cm.v12i1.5640/
%R 10.14708/cm.v12i1.5640
%G pl
%F 10_14708_cm_v12i1_5640