HÄHKIÖNIEMI, M. Perceiving the derivative: the case of Susanna. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 11, n. 1, p. 51–73, 2006. DOI: 10.7146/nomad.v11i1.147982. Disponível em: https://tidsskrift.dk/NOMAD/article/view/147982. Acesso em: 9 jan. 2025.