SZEREDI, Éva. Forming the concept of congruence II. Teaching Mathematics and Computer Science, [S. l.], v. 10, n. 1, p. 1–12, 2012. DOI: 10.5485/TMCS.2012.0248. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14901. Acesso em: 27 sep. 2024.