%0 Journal Article %A Editorial board Editorial Board of Didactica Mathematicae %T Jubilee Congress of Polish Mathematicians %J Didactica Mathematicae %D 2019 %P 121 %V 41 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/dm.v41i0.7028/ %R 10.14708/dm.v41i0.7028 %G pl %F 10_14708_dm_v41i0_7028