TY  - JOUR
AU  - Bożena Maj-Tatsis
AU  - Mirosława Sajka
TI  - The Ninth and the Tenth Congress of the European Research in Mathematics Education (CERME 9 and CERME 10)
JO  - Didactica Mathematicae
PY  - 2017
VL  - 39
UR  - http://geodesic.mathdoc.fr/articles/10.14708/dm.v39i0.6344/
DO  - 10.14708/dm.v39i0.6344
LA  - pl
ID  - 10_14708_dm_v39i0_6344
ER  -