HÄHKIÖNIEMI, Markus. How the derivative becomes visible: the case of Daniel. Teaching Mathematics and Computer Science, [S. l.], v. 5, n. 1, p. 81–97, 2007. DOI: 10.5485/TMCS.2007.0140. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14788. Acesso em: 27 sep. 2024.