BERGER, M. S.; SCHECHTER, M.; SUN, G. Infinite-dimensional singularity theory and bifurcation from equilibria for certain nonlinear evolution equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 4, n. 2, p. 341–353, 1994. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1994.032. Acesso em: 22 lip. 2024.