| Erik Tillema - Vol. 30 Num. 1 (2010) | ||
| Functions of symbolizing activity: a discussion ABSTRACT | 1-8 | |
| Erik Tillema - Vol. 31 Num. 3 (2011) | ||
| Developing systems of notation as a trace of reasoning ABSTRACT | 29-35 | |
| Erik Tillema - Vol. 36 Num. 2 (2016) | ||
| A quantitative and combinatorial approach to non-linear meanings of multiplication ABSTRACT | 26-33 | |
for the learning of mathematics
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