FENG, Z.; DU, Z. Periodic solutions of fractional Laplace equations: Least period, axial symmetry and limit. Topological Methods in Nonlinear Analysis, [S. l.], v. 60, n. 2, p. 633–651, 2022. DOI: 10.12775/TMNA.2022.016. Disponível em: https://apcz.umk.pl/TMNA/article/view/41318. Acesso em: 3 jul. 2024.