%0 Journal Article
%A Anna Sierpińska
%T 38. CIEAEM
%J Didactica Mathematicae
%D 1988
%P  195-205
%V 9
%N 01
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.14708/dm.v9i01.6879/
%R 10.14708/dm.v9i01.6879
%G pl
%F 10_14708_dm_v9i01_6879