%0 Journal Article
%A A. Chądzyńska
%T On some classes of sets related to the symmetry of the tangency relation in a metric space
%J Commentationes Mathematicae
%D 1972
%P  219-228
%V 16
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.14708/cm.v16i1.5738/
%R 10.14708/cm.v16i1.5738
%G pl
%F 10_14708_cm_v16i1_5738