SZILÁGYINÉ SZINGER, Ibolya. The development of geometrical concepts in lower primary mathematics teaching: the square and the rectangle. Teaching Mathematics and Computer Science, [S. l.], v. 6, n. 1, p. 153–171, 2008. DOI: 10.5485/TMCS.2008.0194. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14818. Acesso em: 20 oct. 2024.