LITTLE, Robert D. Self-intersection of fixed manifolds and relations for the multisignature. Mathematica Scandinavica, Berkeley, CA, United States, v. 69, p. 167–178, 1991. DOI: 10.7146/math.scand.a-12376. Disponível em: https://journals.msp.org/mscand/article/view/1295. Acesso em: 24 jul. 2026.