Alfaro-Carvajal, Cristian, Pablo Flores-Martínez, and Gabriela Valverde-Soto. 2019. “Mathematical Proof: Meaning, Types, Attributed Functions, and Relevance As Part of Math Teachers’ Professional Knowledge”. Uniciencia 33 (2), 55-75. https://doi.org/10.15359/ru.33-2.5.