SOUKUP, J. Topological concepts supported by PC multimedia presentation. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 3, p. 245–252, 2003. Disponível em: https://studmath.uken.krakow.pl/article/view/13496. Acesso em: 30 oct. 2026.