VAJDA, Róbert; KOVÁCS, Zoltán. Interactive web portals in mathematics. Teaching Mathematics and Computer Science, [S. l.], v. 1, n. 2, p. 347–361, 2003. DOI: 10.5485/TMCS.2003.0030. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14704. Acesso em: 20 oct. 2024.