IZE, Jorge; VIGNOLI, Alfonso. 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: 8 jul. 2025.