KÓNYA, Eszter. A mathematical and didactical analysis of the concept of orientation. Teaching Mathematics and Computer Science, [S. l.], v. 4, n. 1, p. 111–130, 2006. DOI: 10.5485/TMCS.2006.0108. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14762. Acesso em: 27 sep. 2024.