HERGET, Wilfried; HISCHER, Horst; LAMBERT, Anselm. Vorwort. mathematica didactica, [S. l.], v. 28, n. 1, p. 5–6, 2005. DOI: 10.18716/ojs/md/2005.1057. Disponível em: https://journals.ub.uni-koeln.de/index.php/mathematica_didactica/article/view/1057. Acesso em: 19 may. 2024.