TY  - BOOK
AU  - Watson,Anne
AU  - Ohtani,Minoru
TI  - Task design in mathematics education: an ICMI study 22 
SN  - 9783319096285
PY  - 2015///]
CY  - London
PB  - Springer
KW  - Mathematics
KW  - Study and teaching
KW  - Congresses
ER  -