FADELL, E.; NEUWIRTH, L. Configuration Spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 10, p. 111–118, 1962. DOI: 10.7146/math.scand.a-10517. Disponível em: https://www.mscand.dk/article/view/10517. Acesso em: 24 nov. 2024.