| Rosamund Sutherland - Vol. 11 Num. 3 (1991) | ||
| Some unanswered research questions on the teaching and learning of algebra | 40-46 | |
| Rosamund Sutherland - Vol. 13 Num. 1 (1993) | ||
| Consciousness of the unknown | 43-46 | |
for the learning of mathematics
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