MENTZEN, M. K. Some applications of groups of essential values of cocycles in topological dynamics. Topological Methods in Nonlinear Analysis, [S. l.], v. 23, n. 2, p. 357–375, 2004. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2004.016. Acesso em: 29 mar. 2024.