MAKARA, Ágnes; LÉNÁRT, István. Comparative geometry on plane and sphere: didactical impressions. Teaching Mathematics and Computer Science, [S. l.], v. 2, n. 1, p. 81–101, 2004. DOI: 10.5485/TMCS.2004.0042. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14714. Acesso em: 20 oct. 2024.