SHIBATA, T. Multiple interior layers of solutions to perturbed elliptic Sine-Gordon equation on an interval. Topological Methods in Nonlinear Analysis, [S. l.], v. 15, n. 2, p. 329–357, 2000. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2000.023. Acesso em: 22 lip. 2024.