000 00438 a2200157 4500
001 11271
011 _a0013-1954
090 _a11271
099 _tSER
100 _a20231109 frey50
101 _aeng
102 _aNL
200 _aEducational Studies in Mathematics - An international journal
_feditor in chief Arthur Bakker
207 _aVolume 103.2- February 2020
210 _aDordrecht
_cSpringer
_d2020
215 _d24cm.
_c110p.(p.139-249)