Mognon, Angela, and Michele Carvalho de Barros. “O Uso Do Software GeoGebra No Ensino Da matemática”. Journal of the GeoGebra International Institute of São Paulo, vol. 1, no. 1, May 2012, p. CCCVIII - CCCXXII, https://revistas.pucsp.br/index.php/IGISP/article/view/8392.