TY  - JOUR
AU  - Jacek Dymel
TI  - A commentary to Szurek's article
JO  - Didactica Mathematicae
PY  - 2019
SP  -  167 
EP  - 171
VL  - 41
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/dm.v41i0.7032/
DO  - 10.14708/dm.v41i0.7032
LA  - pl
ID  - 10_14708_dm_v41i0_7032
ER  -