PATTY, C. W. Homology of Deleted Product Spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 29, p. 211–231, 1971. DOI: 10.7146/math.scand.a-11047. Disponível em: https://www.mscand.dk/article/view/11047. Acesso em: 5 may. 2024.