GOODRICH, C. S. Coercive functionals and their relationship to multiplicity of solution to nonlocal boundary value problems. Topological Methods in Nonlinear Analysis, [S. l.], v. 54, n. 2, p. 409–426, 2019. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2019.029. Acesso em: 19 apr. 2024.