eSquirrel: Digitale Lehr- und Lernunterstützung im Mathematikunterricht. R&E-SOURCE, [S. l.], v. 13, n. 2, p. 34–40, 2026. DOI: 10.53349/re-source.2026.i2.a1587. Disponível em: https://journal.ph-noe.ac.at/index.php/resource/article/view/1587. Acesso em: 17 may. 2026.