WU, P.; ZHOU, Y. Sign-changing solutions for the boundary value problem involving the fractional $p$-Laplacian. Topological Methods in Nonlinear Analysis, [S. l.], v. 57, n. 2, p. 597–619, 2021. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2020.051. Acesso em: 22 lip. 2024.