YAN, B.; AN, C. The sign-changing solutions for a class of nonlocal elliptic problem in an annulus. Topological Methods in Nonlinear Analysis, [S. l.], v. 55, n. 1, p. 1–18, 2020. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2019.081. Acesso em: 25 apr. 2024.