ARAGÃO-COSTA, E. R.; CARABALLO, T.; CARVALHO, A. N.; LANGA, J. A. Continuity of Lyapunov functions and of energy level for a generalized gradient semigroup. Topological Methods in Nonlinear Analysis, [S. l.], v. 39, n. 1, p. 57–82, 2012. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2012.004. Acesso em: 22 jul. 2024.