NIEDERMEYER, Inga; RUWISCH, Silke; HEIL, Cathleen. Development of Early Spatial Perspective-Taking – Toward a Three-Level Model. mathematica didactica , [S. l.], v. 44, n. 2, 2021. DOI: 10.18716/ojs/md/2021.1216. Disponível em: https://journals.ub.uni-koeln.de/index.php/mathematica_didactica/article/view/1216. Acesso em: 8 mai. 2024.