Santos, Eliane Elias Ferreira dos, Aleandra da Silva Figueira-Sampaio, and Gilberto Arantes Carrijo. “Mapping Free Educational Software Intended for the Development of Numerical and Algebraic Reasoning”. International Journal of Learning, Teaching and Educational Research 16, no. 11 (November 30, 2017): 45–66. Accessed April 19, 2026. https://ijlter.net/index.php/ijlter/article/view/769.