CHRISTENSEN, L. W. Sequences for complexes. MATHEMATICA SCANDINAVICA, [S. l.], v. 89, n. 2, p. 161–180, 2001. DOI: 10.7146/math.scand.a-14336. Disponível em: https://www.mscand.dk/article/view/14336. Acesso em: 3 jul. 2024.