IZE, J.; VIGNOLI, A. Equivariant degree for Abelian actions. Part III: orthogonal maps. Topological Methods in Nonlinear Analysis, [S. l.], v. 13, n. 1, p. 105–146, 1999. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.006. Acesso em: 22 jul. 2024.