GUBLER-BECK, Annemarie. Lernprozesse mittels Portfolio erfassen: warum und wie?. mathematica didactica , [S. l.], v. 33, p. 5–31, 2010. DOI: 10.18716/ojs/md/2010.1094. Disponível em: https://journals.ub.uni-koeln.de/index.php/mathematica_didactica/article/view/1094. Acesso em: 3 juli. 2024.