IZE, J.; VIGNOLI, A. Equivariant degree for Abelian actions. Part II: Index computations. Topological Methods in Nonlinear Analysis, [S. l.], v. 7, n. 2, p. 369–430, 1996. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1996.017. Acesso em: 25 apr. 2024.