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Personal definitions and structural aspects of the concept of finite limit of a function at one point. (Definiciones personales y aspectos estructurales del concepto de límite finito de una función en un punto.) (Spanish)
PNA. Rev. Investig. Didact. Mat. 7, No. 3, 117-130 (2013).
1
Distinguishing schemes and tasks in children’s development of multiplicative reasoning. (English)
PNA. Rev. Investig. Didact. Mat. 7, No. 3, 85-101 (2013).
2
Reasoning by contradiction in dynamic geometry. (English)
PNA. Rev. Investig. Didact. Mat. 7, No. 2, 63-73 (2013).
3
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