TY  - JOUR
AU  - Martti E. Pesonen
AU  - Lenni Haapasalo
AU  - Timo Ehmke
TI  - Critical look at dynamic sketches when learning mathematics
JO  - The Teaching of Mathematics
PY  - 2006
SP  - 19 
VL  - IX
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM2_2006_IX_2_a1/
LA  - en
ID  - TM2_2006_IX_2_a1
ER  -