SANTOS, E. E. F. dos .; FIGUEIRA-SAMPAIO, A. da S. .; CARRIJO, G. A. . Mapping Free Educational Software Intended for the Development of Numerical and Algebraic Reasoning. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 16, n. 11, p. 45–66, 2017. Disponível em: http://www.ijlter.net/index.php/ijlter/article/view/769. Acesso em: 20 apr. 2026.