ORTLIEB, Claus Peter. Mathematische Modelle und Naturerkenntnis . mathematica didactica , [S. l.], v. 27, n. 1, p. 23–40, 2004. DOI: 10.18716/ojs/md/2004.1023. Disponível em: https://journals.ub.uni-koeln.de/index.php/mathematica_didactica/article/view/1023. Acesso em: 18 mai. 2024.