ŻYTKO, M. Between theory and practice: Teaching maths to elementary school students in Poland. Da Investigação às Práticas: Estudos de Natureza Educacional, [S. l.], v. 4, n. 1, p. 44–58, 2014. DOI: 10.25757/invep.v4i1.16. Disponível em: https://ojs.eselx.ipl.pt/index.php/invep/article/view/16. Acesso em: 25 jun. 2022.