BERGER, Melvyn S.; SCHECHTER, Martin; SUN, Guozhang. 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: 8 jul. 2025.