Gérard Vergnaud - Vol. 3 Num. 2 (1983) | ||
Cognitive and developmental psychology and research in mathematics education: some theoretical and methodological issues | 31-41 | |
Gérard Vergnaud - Vol. 4 Num. 2 (1984) | ||
Communication: Research problems in mathematics education - II | 39-44 |
for the learning of mathematics
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