SCHUMANN, Heinz. Interaktives geometrisches Konstruieren im virtuellen Raum. mathematica didactica , [S. l.], v. 29, n. 1, p. 41–68, 2006. DOI: 10.18716/ojs/md/2006.1060. Disponível em: https://journals.ub.uni-koeln.de/index.php/mathematica_didactica/article/view/1060. Acesso em: 3 juli. 2024.