%0 Journal Article
%A Marianna Ciosek
%A Maciej Klakla
%T CIEAEM 50
%J Didactica Mathematicae
%D 1998
%P  121-127
%V 20
%N 01
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.14708/dm.v20i01.6752/
%R 10.14708/dm.v20i01.6752
%G pl
%F 10_14708_dm_v20i01_6752