TY  - JOUR
AU  - Tonov, Ivan
TI  - Mathematics Education of Teachers – an Old and Still Open Question
JO  - Mathematics and Education in Mathematics
PY  - 2021
SP  - 133
EP  - 136
VL  - 50
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MEM_2021_50_a12/
LA  - bg
ID  - MEM_2021_50_a12
ER  -