OSWALD. Besondere Punkte der Euler-Geraden. Teaching Mathematics and Computer Science, [S. l.], v. 3, n. 2, p. 145–157, 2005. DOI: 10.5485/TMCS.2005.0073. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14745. Acesso em: 27 sep. 2024.