TY  - BOOK
AU  - Angelika Bikner-Ahsbahs Christine Knipping Norma Presmeg
TI  - Approaches to Qualitative Research in Mathematics Education
SN  - 9789401791816
PB  - Springer
UR  - https://link.springer.com/openurl?genre=book&isbn=978-94-017-9181-6
ER  -