GÖK, G.; ERBILGIN, E. An Addition Game with Virtual Manipulatives. Journal of Inquiry Based Activities, [S. l.], v. 2, n. 1, p. 10–18, 2012. Disponível em: https://www.ated.info.tr/index.php/ated/article/view/82. Acesso em: 15 oct. 2025.